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Showing posts with label Asic design. Show all posts
Showing posts with label Asic design. Show all posts

Mar 22, 2024

Table of Contents


Here is the blog site map. Feel free to post your feedback to improve it further. 

CONTENTS

1.Introduction : 

1.1  Career Growth in VLSI Industry

1.2  The Future of Semiconductor 

2. VLSI Topics

2.1  Semiconductor Job Portal - Intern & freshers  

2.2  Digital Design for Beginners and Professionals

2.3  Career Growth in VLSI Industry

2.4  The Future of Semiconductor 

2.6  VLSI Industry Update

2,7  List of Semiconductor Companies

2.8  Top 10 VLSI companies

2.9  VLSI Industry Updates

2.10 Engineering Basics

2.11 Open Sourced FREE CAD/EDA VLSI tools 

2.12 List of top 10 companies in Semiconductor - 2021 

2.13 The best top 20 universities for MS in Digital VLSI in USA

2.14 Solution: Verilog HDL A guide to Digital Design and Synthesis - Samir Palnitkar 

2.15 Question Answer on VLSI Semiconductor 


 3. Digital Design:

3.1  Low Power Design Technique

3.7  UPF Example 

3.23 Type of Adders with Verilog Code

3.24 VHDL operator 

3.25 Asynchronous FIFO with Programmable Depth

3.26 Asic Implementation Design Cycle 

3.27  Comparing AMBA AHB to AXI Bus using System Modeling. 

3.28 Difference between I2C or CAN protocol ? 

3.29  Retention Cells - UPF



4. Semiconductor Interface/Bus Protocols

4.4  SPI

4.7  Microwire IP Interface 

6.18 Verilog code for Synchronous FIFO ( First In First Out  )


10.3 Physical Aware Synthesis 


11. Integrated-Circuit Fabrication


12. AHB-AXI Protocol 


13. PCIe Protocol 


14. Solution  :Samir Palnitkar : A Guide to Digital Design and Synthesis 

15. Place holder5


16. DAA


17. Scripting/Others

17.3  GVIM Help


18. Interview Preparation

18.5 Digital Design Interview Question on PCIe express 

 

19. Academic/ Educational Projects with Micro-Architecture and Verilog code

19.4  Microwire IP  


20. Verification


21. Physical Design

21.2 Physical Design - Common Questions  


22. General Question:

22.1  Logical Question

22.2  APTITUDE Question for Interviews


22B . VLSI Quiz 

22B.1  Quiz1 : Digital Design


23. Non-VLSI Topics:

23.8 How to start a academic project 

23.9  Team Leadership Score check 

23.10 Team Leadership Question/Answer

23.11 Being productive while working from home 


24. Salary Around the Globe

24.1 Norway Salary - Average salary for Senior Software Engineer in Norway with 10+ years experience? 

24.2  Sweden Salary - An Average salary in Sweden for IT professional  


25. Job Opportunities in Norway 

25.1  Norway Salary - Average salary for Senior Software Engineer in Norway with 10+ years experience? 

25.2  Is it hard to get a job in Norway, as a foreigner?

25.3  Living cost in Norway , compared with India

 

26. Finland Opportunities in IT Sector

26.1  Moving to Finland from India , is it worth ?

27. Funny Posts ( non technical )

27.1 40+ Photos That Evoke a Lot of Curious Questions and Can’t Be Explained


Aug 23, 2021

Verilog code for 8b/10b encoder and decoder


8b/10b is used mainly for clock recovery in serial communication. With this coding, the serial line will always get a balanced stream of 0's and 1's which give enough switching of 0's and 1's level on the line. It is called DC balancing.
Using this encoding will result in 25% overhead in the data stream , meaning to transmit 80-bits , you will actually transmit 100-bits.

To understand the encoding/decoding , it is highly recommended to read about the "running disparity".


Note that in the following tables, for each input byte, A is the least significant bit, and H the most significant. The output gains two extra bits, i and j. The bits are sent low to high: a, b, c, d, e, i, f, g, h, and j; i.e., the 5b/6b code followed by the 3b/4b code. This ensures the uniqueness of the special bit sequence in the comma codes.

The residual effect on the stream to the number of zero and one bits transmitted is maintained as the running disparity (RD) and the effect of slew is balanced by the choice of encoding for following symbols.

The 5b/6b code is a paired disparity code, and so is the 3b/4b code. Each 6- or 4-bit code word has either equal numbers of zeros and ones (a disparity of zero), or comes in a pair of forms, one with two more zeros than ones (four zeros and two ones, or three zeros and one one, respectively) and one with two less. When a 6- or 4-bit code is used that has a non-zero disparity (count of ones minus count of zeros; i.e., −2 or +2), the choice of positive or negative disparity encodings must be the one that toggles the running disparity. In other words, the non zero disparity codes alternate.
Below is the code for encoder and decoder. Contact me for the soft copy of RTL code.

Encoder Implementation Details ->

Implementation will be based on LUT which can be found in PCIe Specification.

Encoder Pin Descriptions
Name
Type
Descriptions
Clk
I
Encoder Clock. This pin is the main clock of the encoder. All registered inputs and outputs of the encoder are based on the rising of this clock.
Rstn
I
Active Low reset
Data_in[7:0]
I
8-bit data input
kchar
I
Control input
disp_in
I
Running Disparity Input. This pin provides to the encoder the running disparity before the encoding of current 8-bit data on datain_8b bus.
0 - -ve disparity
1 - +ve disparity
data_out[9:0]
O
Encoded data out
disp_out
O
Running disparity output
err
O
Invalid control character requested


Verilog code for 8b/10b encoder
-------------- Verilog Code Start ----------------
WIP

-------------- Verilog Code End  ----------------

Verilog code for 8b/10b decoder
-------------- Verilog Code Start ----------------
WIP 

-------------- Verilog Code End  ----------------

Testbench for the Verilog code , Instantiated encoder and decoder. 


Thanks for visiting the Blog , please share your comments.
Ref - https://en.wikipedia.org/wiki/8b/10b_encoding

Aug 2, 2021

IC Fabrication : Interview Questions / Answers



1.Define an Integrated circuit.
An integrated circuit(IC) is a miniature ,low cost electronic circuit consisting of active and passive components fabricated together on a single crystal of silicon.The active components are transistors and diodes and passive components are resistors and capacitors.

2.What are the basic processes involved in fabricating ICs using planar technology?

1.Silicon wafer (substrate) preparation
2.Epitaxial growth
3.Oxidation
4.Photolithography
5.Diffusion
6.Ion implantation
7.Isolation technique
8.Metallization
9.Assembly processing & packaging


3.List out the steps used in the preparation of Si – wafers.

1.Crystal growth &doping
2.Ingot trimming & grinding
3.Ingot slicing
4.Wafer policing & etching
5.Wafer cleaning


4.Write the basic chemical reaction in the epitaxial growth process of pure silicon.
The basic chemical reaction in the epitaxial growth process of pure silicon is the hydrogen reduction of silicon tetrachloride.

SiCl4 + 2H2 <•••••1200oC ••••••> Si + 4 HCl



5.What are the two important properties of SiO2?
1.SiO2 is an extremely hard protective coatng & is unaffected by almost all reagents except by hydrochloric acid. Thus it stands against any contamination.
2.By selective etching of SiO2 , diffusion of impurities through carefully defined windows in the SiO2 can be accomplished to fabricate various components.


6.Explain the process of oxidation.
The silicon wafers are stacked up in a quartz boat & then inserted into quartz furnace tube. The Si wafers are raised to a high temperature in the range of 950 to 1150oC & at the same time, exposed to a gas containing O2 or H2O or both. The chemical action is

Si + 2H2O •••••••••••> SiO2+ 2H2


7. What are oxidation induced defects in semi conductor?
1.Stacking faults
2.Oxide isolation defects

Stacking faults:
Structural defects in the silicon lattice is called oxidation induced stacking faults. The growth of stacking faults is a strong function of substrate orientation , conductivity type & defect nuclei present. The stacking faults formation can be suppressed by the addition of HCl.

Oxide isolation defects :
The stress along the edges of an oxidised area produce severe damage in the silicon. Such defects results in increased leakage in nearby devices. High temperatures (around 950oC ) will prevent stress induced defect formation.


8.What is lithography?
Lithography is a process bywhich the pattern appearing on the mask is transfered to the wafer.It involves two steps: the first step requires applying a few drops of photoresist to the surface of the wafer & the second step is spinning the surface to get an even coating of the photoresist across the surface of the wafer.


9.What are the different types of lithography? What is optical lithography?
The different types of lithography are :
1.Photolithography
2.Electron beam lithography
3.X ray beam lithography
4.Ion beam lithography
5.Optical lithography:

10.What are the two processes involved in photolithography?
a) Making a photographic mask
b) Photoetching
The development of photographic mask involves the preparation of initial artwork and its reduction , decomposition of initial artwork or layout into several mask layers. Photoetching is used for the removal of SiO2 from desired regions sothat the desired impurities can be diffused.


11.Distinguish between dry etching & wet etching.
Dry etching
1.Gaseous mixture is used as the chemical reagent.
2.Smaller line openings( 1µm) are possible with dry etching
3.It produces straight walled etching process.

Wet etching
Chemical reagents used are in the liquid form.
Line opening are larger.(> 1µm)
It produces patterns with undercutting.


12.What is meant by reactive etching?
The term reactive plasma is meant to describe a discharge in which ionization & fragmentation of gases takesplace & produce chemically active plasma species, frequently oxidizers and reducing agents. Such plasmas are reactive both in the gas phase & with solid surfaces exposed to them. When these interactions are used to form volitile products so that material is removed or etching of material form surfaces that are not masked to form lithographic patterns , the technique is known as reactive plasma etching.


13.What are isotropic & anisotropic etching processes?
Isotropic etching is a wet etching process which involves undercutting.
Aisotropic etching is a dry etching process which provides straight walled patterns.


14.Define diffusion.
The process of introducing impurities into selected regions of a silicon wafer is called diffusion. The rate atwhich various impurities diffuse into the silicon will be of the order of 1µm/hr at the temperature range of 900oC to 1100oC .The impurity atoms have the tendency to move from regions of higher concentrations to lower concentrations.


15.What is dielectric isolation?
In dielectric isolation, a layer of solid dielectric such as SiO2 or ruby completely surrounds each components thereby producing isolation , both electrical & physical. This isolating dielectric layer is thick enough so that its associated capacitance is negligible. Also, it is possible to fabricate both pnp & npn transistors within the same silicon substrate.


16.What are the advantages of ion implantation technique?
1. It is performed at low temperature. Therefore, previously diffused regions have a lesser tendency for lateral spreading.
2. In diffusion process, temperature has to be controlled over a large area inside the oven, whereas in ion implantation process, accelerating potential & beam content are dielectrically controlled from outside.


17.What is metallization?
The process of producing a thin metal film layer that will serve to make interconnection of the various components on the chip is called metallization.

May 3, 2021

Tips to start a Academic project from scratch to completion


Many students ask , what are the steps to start a academic project , I understand , many people like to learn many things , for example , bus protocols (AHB,AXI, PCIe,USB , etc ) , there are so many of things to learn if someone wishes to do.

Here are the steps to start :

1. Decide a Topic/Subject

This should be based on your future goal and should be align with your current career.

2. Once project topic is decided, you can start collecting the material, like specification, IEEE papers , collect as much as information you can and sort it out , and start reading on the project topic.

3. DO NOT GO for coding directly.

4. Start writing the design specification , we call it micro-architecture

6. First make the input/output interface, findout what are the signals available.

7. Make sure you get good knowledge on it before writing down the specification.

8. Once your top level block diagram is ready, then start thinking about the sub-blocks.

9. This will keep going on , by writing a design-specification, your 60% job is done !! Yeah !!

10.Once specification is done, you can start writing the code.

11.Once code is dome, you can write down the testing logic also.


After step 11, your project would be 100% complete.. 

Few useful links 

Apr 19, 2021

VLSI_EXPERT: Transition Violation in Semiconductor


Max transition (clock or data) is the maximum slew that is allowed at the cell input pin.
This comes either from the library, or it can come from a manually constrained file from the designer.
Similarly, max capacitance check limits the allowed capacitance on the output pin of a cell.



The transition time of a net becomes the time required for its driving pin to change logic values (from 10% (20%) to the 90% (80%) of its maximum value). This transition time used for delay calculations are based on the timing library (.lib files).

Input transition and output load are used to characterize delay through a circuit. Typically, a circuit is simulated under many different process, temperature and voltage conditions over a range of input transitions and output loads to characterize circuit performance. Some design teams prefer to model very accurate delays over a tight range of variables while others can afford to sacrifice some accuracy to accommodate a wider range of performance, e.g. a NAND gate simulated over input transitions from 5ps to 90ps and output loads from 3fF to 200fF could have a more accurate result than one characterized over 0ps to 1ns inputs and 0fF to 1pF outputs.

These are important checks in the timing drcs. Max transition (clock or data) is the maximum slew that is allowed at the cell input pin.This comes either from the library, or it can come from a manually constrained file from the designer.
Similarly, max capacitance check limits the allowed capacitance on the output pin of a cell.

Flagging these and fixing them help with lower dynamic leakage (short circuit current) and reaching more reliability.

Fixing Transition Violation
1. Up sizing the driver cell.
2. Decreasing the net length by moving cells nearer or reducing long routed net.
3. By adding buffers.
4. By using existing spare cells as buffers.
5. By splitting loads through buffers to reduce the fan out number (number of driven cells)



Table of Contents

Jan 18, 2021

List of Semiconductor Companies

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Company Name  Career Website
Apple Inc. https://www.apple.com/careers/in/
HP Inc. https://jobs.hp.com/search-results/
Intel Corporation https://www.intel.com/content/www/us/en/jobs/jobs-at-intel.html
Microsoft Corporation https://careers.microsoft.com/
Renesas Corporation https://jobs.renesas.com/
STMicroelectronics https://www.st.com/content/st_com/en/about/careers.html
Texas Instruments https://careers.ti.com/
ACON, Advanced-Connectek, Inc. http://www.acon.com/en-global/career/index/13
Advanced Micro Devices https://careers.amd.com/ 
Allion Labs, Inc. https://www.allion.com/recruiting/
Analogix Semiconductor, Inc. https://www.analogix.com/about-us/careers
Anritsu Corporation https://www.anritsu.com/en-in/about-anritsu/employment/current-vacancies
ASMedia Technology Inc. https://www.asmedia.com.tw/careers
Avery Design Systems, Inc. https://www.avery-design.com/company/careers/
BitifEye Digital Test Solutions GmbH https://www.bitifeye.com/about-us-4-2/jobs/
Bizlink Technology, Inc. https://www.bizlinktech.com/careers
Cadence Design Systems, Inc. https://www.cadence.com/en_US/home/company/careers.html
Corigine, Inc. https://www.corigine.com/careers.html
Corning Optical Communications LLC https://www.corning.com/in/en/careers.html
Cypress Semiconductor https://www.infineon.com/cms/en/careers/
Dell Inc. https://jobs.dell.com/
Diodes Incorporated https://www.diodes.com/about/careers/
DisplayLink (UK) Ltd. https://www.synaptics.com/careers
DJI Technology Co., Ltd. https://we.dji.com/
Electronics Testing Center, Taiwan  
Elka International Ltd. https://www.elka.com/
Ellisys https://www.ellisys.com/company/jobs.php
Etron Technology  Inc. https://etron.com/careers/
Foxconn / Hon Hai https://recruit.foxconn.com/isite-web/mbMain.changeLang.do?selLang=EN
Fresco Logic Inc. https://www.linkedin.com/company/fresco-logic
Genesys Logic, Inc. https://www.genesys.com/en-sg/company/careers
Google Inc. https://careers.google.com/
Granite River Labs https://www.graniteriverlabs.com/en-us/careers
Hotron Precision Electronic Ind. Corp http://www.hotron-ind.com/en/
I-PEX (Dai-ichi Seiko) https://cms-www.i-pex.com/who-we-are
Japan Aviation Electronics Industry Ltd. https://www.jae.com/en/
JMicron Technology Corp. https://www.jmicron.com/
Kandou Bus SA  
Keysight Technologies Inc. https://www.keysight.com/in/en/home.html
L&T Technology Services https://www.ltts.com/careers
LeCroy Corporation https://teledynelecroy.com/
Lenovo https://jobs.lenovo.com/
LG Electronics Inc. https://www.lg.com/global/careers/career
Lintes Technology Co., Ltd. https://en.lintestech.com/contact/
Lotes Co., Ltd. https://www.lotes.cc/
Luxshare-ICT https://en.luxshare-ict.com/join/index.html
Maxio Technology (Hangzhou) Ltd. http://www.maxio-tech.com/?cur_lang=en
MediaTek Inc. https://careers.mediatek.com/
MegaChips Corporation https://www.indiajobvaccancies.com/jobs-in-megachips-corporation.html
Mercedes-Benz Research & Development, North America, Inc. https://www.mercedes-benz.co.in/passengercars/the-brand/career.html
Microchip Technology Inc. https://careers.microchip.com/
Molex LLC https://jobs.kochcareers.com/search/molex/jobs/in
MQP Electronics Ltd. https://www.mqp.com/
Newnex Technology Corp. https://www.newnex.com/
NVIDIA https://www.nvidia.com/en-in/about-nvidia/careers/
NXP Semiconductors https://www.nxp.com/company/about-nxp/careers:CAREERS
Oculus VR LLC https://www.metacareers.com/areas-of-work/oculus/
ON Semiconductor https://www.onsemi.com/careers
Parade Technologies Inc. https://www.paradetech.com/jobs/
Phison Electronics Corp. https://www.phison.com/en/company/career
Qualcomm Inc https://www.qualcomm.com/company/careers
Realtek Semiconductor Corp. https://www.realtek.com/en/41-category-en/c-careers-en
Rohde & Schwarz GmbH & Co. KG https://www.rohde-schwarz.com/in/career/overview/career_233504.html
Samsung Electronics Co. Ltd. https://www.samsung.com/in/about-us/careers/
Seagate Technology LLC https://seagatecareers.com/
Silicon Line GmbH https://www.silicon-line.com/careers/
SiliConch Systems Private Limited https://www.siliconch.com/careers.php
Softnautics LLP https://www.softnautics.com/careers/
Spectra7 Microsystems Corp. https://www.spectra7.com/careers
Specwerkz https://swzd.com/careers/
STMicroelectronics https://www.st.com/content/st_com/en/about/careers.html
Sumitomo Electric Ind.  Ltd. Optical Comm. R&D Lab https://sumitomoelectric.com/careers
Synaptics Inc. https://www.synaptics.com/careers
Synopsys  Inc. https://www.synopsys.com/careers.html
Tektronix Inc. https://careers.fortive.com/tektronix/home
Thine Electronics Inc. https://www.thine.co.jp/en/corporate/jobs/
Tyco Electronics Corp., a TE Connectivity Ltd. company https://careers.te.com/
Varjo Technologies https://varjo.com/jobs/
VIA Labs Inc. https://www.via-labs.com/careers.php
VIA Technologies Inc https://www.via-labs.com/careers.php
Weltrend Semiconductor http://www.weltrend.com/en-global/career
Western Digital https://jobs.westerndigital.com/
Wilder Technologies https://www.wilder-tech.com/en/careers
Faststream Technologies https://www.faststreamtech.com/company/jobs/
Infineon Technologies India Pvt. Ltd https://www.infineon.com/cms/en/careers/
Saankhya Labs https://saankhyalabs.com/careers/
Semtronics Micro Systems https://www.instahyre.com/jobs-at-semtronics-micro-systems/
SmartPlay Technologies  
Terminus Circuits http://www.terminuscircuits.com/careers/
Vayavya Labs https://vayavyalabs.com/careers/
Alliance Semiconductor (India) Pvt. Ltd.  
Analog Devices (India) Pvt. Ltd. https://www.analog.com/en/about-adi/careers.html
Arcus Technology Pvt. Ltd. https://www.linkedin.com/company/arcus-technology
Axes Technologies (India) Pvt. Ltd.  
Apex Technologies pvt.ltd.  
Apara Design Automation Pvt.ltd http://www.icon-dapl.com/
Broadcom https://www.broadcom.com/company/careers
CMOS Chips  
Cisco Systems (India) Pvt. Ltd. https://www.cisco.com/c/en/us/about/careers.html
Semiconductors India Pvt. Ltd.  
D’GIPRO Systems Pvt. Ltd. http://dgipro.com/
Digital-X (India) Pvt Ltd. https://www.digitalx.com/
Digital Equipment India ltd. https://www.linkedin.com/company/digitalequipmentltd
Digipro Design Automation http://dgipro.com/
Future Techno Designs Pvt. Ltd. Closed
GPS Usha Pvt. Ltd. https://www.usha.in/careers.php
GDA Technologies https://www.naukri.com/gda-technologies-jobs-careers-4136
GE India Technology center https://www.ge.com/in/careers
Godrej & Boyce Mfg. Co. Ltd https://www.godrej.com/godrejandboyce/gnb-careers
HiQ Networks (India) Pvt. Ltd. https://www.hiqelectronics.com/jobs/
IBM Global Services India Pvt. Ltd. https://www.ibm.com/careers/in-en/
Lucent Technologies India Ltd. https://www.al-enterprise.com/en/company/about-us/careers
Motorola India Electronics Ltd. https://www.motorolasolutions.com/en_xp/about/careers.html
NatSem India Designs Pvt. Ltd. https://www.zaubacorp.com/company/NATSEM-INDIA-DESIGNS-PRIVATE-LIMITED/U67120KA1995PTC018344
Ncore Technology Pvt. Ltd. https://www.nkorrtechnologies.com/
Philips SemiconductorsBangalore https://www.nxp.com/company/about-nxp/careers:CAREERS
Sage Design Systems (India) Pvt. Ltd. https://sageuniversity.edu.in/Career
Sanyo LSI Technology India Ltd. https://in.linkedin.com/company/sanyo-india-pvt-ltd-
Siemens Public Communications https://new.siemens.com/global/en/company/jobs/search-careers.html
Silicon Automation Systems (India) Pvt. Ltd. (SASI) http://www.sme.in/silicon/
Spike Technologies (India) Pvt.Ltd. http://spiketech.in/
Shonk Technologies ltd  
Tata Elxsi Ltd. https://www.tataelxsi.com/careers-experience
Texas Instruments (India) Ltd. https://careers.ti.com/about-us-ti-india/
ThinkIT (India) Pvt. Ltd. https://www.thinkitive.com/company/careers.html
TVSE  
U&I Scotty Computers Pvt. Ltd. https://ui.talentlyft.com/
Vedatech India (Software) Pvt. Ltd. https://www.naukri.com/veda-tech-recruiters
Veriphone https://www.verifone.com/en/careers
Wipro Ltd. https://careers.wipro.com/careers-home/
Sasken Communication Technologies https://careers.sasken.com/
Ittiam Systems https://www.ittiam.com/careers/
SoftJin Technologies Pvt. Ltd. https://www.timesjobs.com/jobs/accounting-tax-jobs-in-softjin-technologies-pvt-ltd
Jataayu Techosolutions  Pvt. Ltd. https://in.linkedin.com/company/jataayu-software
Infosys https://career.infosys.com/
Prestige Meridian-l  
Insilica Semiconductors Pvt.Ltd. https://www.linkedin.com/company/insilica
Adroit IC Design http://www.adroitgroup.com/careers.php
 Agilent Technologies  Bangalore
 Altera Bangalore
 AMD  Hyderabad
 Analinear Technologies  Hyderabad
 Analog Devices  Bangalore
 Arasan Chip System  Bangalore
 ARM  Bangalore
 Atheros  Chennai
 Atmel  Chennai
 Beceem  Bangalore
 BlackPeppertech  Bangalore
 Broadcom  Bangalore
 Brocade  Bangalore
 CGCoreEL Bangalore
 Cirrus logic Bangalore
 Cisco Bangalore
 Concept2Silicon Bangalore
 Cosmic circuits Bangalore
 CVC  Bangalore
 Cypress Semiconductors Bangalore
 einfinitus Bangalore
 Einfochips Bangalore
 EVE Bangalore
 Firstpass-semi  Hyderabad
 Freescale semiconductors Bangalore
 GD micro Bangalore
 IBM Bangalore
 IDT Bangalore
 Ikanos communications Bangalore
 Infinera Bangalore
 Infenion Bangalore
 Insilica Bangalore
 Intel  Bangalore
 Interra systems Bangalore
 Ittiam Bangalore
 Juniper Networks  Bangalore
 Karmic  Bangalore
 Kasura Technologies  Bangalore
 Kawasaki Micro  Bangalore
 KPIT Cummings Bangalore
 Lattice Semiconductor Bangalore
 LSI  Bangalore
 Magnachip not in india Bangalore
 Mbitwireless Bangalore
 Microchip  Bangalore
 Micronas not in india Bangalore
 Mindspeed  Hyderabad
 MindTree Bangalore
 Mirafra Technologies  Bangalore
 MRO-TEK Bangalore
 Moschip Semiconductors Bangalore
 Mosys  Hyderabad
 National Semiconductor Bangalore
 Encore Bangalore
 Netlogicmicro  Bangalore
 nvidia  Bangalore
 NXP Semiconductors  Bangalore
 Open-silicon  Bangalore
 Orca systems  Bangalore
 Ordyn  Bangalore
 Perfectus  Bangalore
 picoChip Bangalore
 PMC sierra  Bangalore
 Qlogic  Bangalore
 Qthink Technologies Bangalore
 Qualcomm  Bangalore
 Rambus Bangalore
 Rancore Technologies Bangalore
 Redpine Signals  Hyderabad
 Rensas Bangalore
 Sasken communications  Bangalore
 Sandisk  Bangalore
 Samsung  Bangalore
 Scolish Technologies  Bangalore
 Semindia  Hyderabad
 Sibridge Technologies Bangalore
 Silabs not in india Bangalore
 Silicon hive  Bangalore
 Smart-dv  Bangalore
 Smartplay  Bangalore
 Soctronics  Hyderabad
 ST Microelectronics Bangalore
 Tanmic  Bangalore
 Tata Elixi Bangalore
 TCS  Bangalore
 Tejas networks  Bangalore
 Teranetics Bangalore
 Texas instruments  Bangalore
 Transwitch Bangalore
 Tundra semiconductors  Hyderabad
 Vinchip Systems Bangalore
 Vitesse semiconductors Bangalore
 Whizchip  Bangalore
 Wipro  Bangalore
 Xambala  Bangalore
 Xilinx  Hyderabad
 Zarlink Semiconductor Bangalore
 Signoff Semiconducto Bangalore
Some more are in Hyderabad location.  
AMD Hyderabad
ams OSRAM ( formerly Austria micro systems) Hyderabad
Broadcom Inc. Hyderabad
Blaize (formerly ThinCI) Hyderabad
Intel Corporation Hyderabad
Imagination Technologies Hyderabad
Marvell Technology Hyderabad
Micron Technology Hyderabad
Microchip Technology Inc. Hyderabad
NVIDIA Hyderabad
NXP Semiconductors Hyderabad
Qualcomm Hyderabad
Silicon Labs Hyderabad
Siemens EDA (Siemens Digital Industries Software) formerly Mentor Hyderabad
Synaptics Incorporated Hyderabad
Synopsys Inc Hyderabad
Xilinx (Now AMD) Hyderabad
   
Start up companies:  
Axiado Corporation Start-Up 
BrainChip Start-Up 
Ceremorphic, Inc. Start-Up 
Kinara, Inc. (formerly Deepvision Inc) Start-Up 






semiconductor startups in india 
Top 10 semiconductor companies in India 
Top semiconductor companies