Design of CMOS based Programmable Gain Operational Amplifier

Sparsh Raut Dessai, Pramath Keny, Urvang Gaitonde, M. V.Sharath Chandra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


Variable Gain Amplifier (VGA) is an integral part of Analog Systems, a special class of VGA called the Programmable Variable Gain Amplifier (PVGA) has revolutionized modern electronic systems. In this paper a highly specific Programmable Gain Operational Amplifier (PGOA) is presented. The Op-Amp design is based on a low distortion source coupled differential amplifier model. The gain of the Op-Amp is varied by adjusting an array of internal series and feedback resistors; to facilitate this setting, three 8-bit programmable registers are provided using which a gain of 24 dB can be attained. Additionally, the design also features two 8-bit registers for status read back operation of the Op-Amp. The overall gain of the Op-Amp varies from -12dB to 12dB for a single stage. The design is embedded application interface compatible. The PGOA is an ideal solution to systems which require variable gain in real time applications and in signal processing. The modeling of the PGOA is made using CMOS device technology and the detailed analysis is summarized.

Original languageEnglish
Title of host publicationProceedings - RSM 2013
Subtitle of host publication2013 IEEE Regional Symposium on Micro and Nano Electronics
Number of pages4
Publication statusPublished - 01-12-2013
Externally publishedYes
Event2013 IEEE Regional Symposium on Micro and Nano Electronics, RSM 2013 - Langkawi, Malaysia
Duration: 25-09-201327-09-2013


Conference2013 IEEE Regional Symposium on Micro and Nano Electronics, RSM 2013

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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