Enhancement of Op-Amp Characteristics By Improving Common Mode Rejection Ratio
Himanshu Sirohia1, Koushik Chakraborty2, Neha Mathur3
1Himanshu Sirohia, Assistant Professor, Jayoti Vidhyapeeth Women’s University, Jaipur (Rajasthan), India.
2Koushik Chakraborty, Assistant Professor, Jayoti Vidhyapeeth Women’s University, Jaipur (Rajasthan), India.
3Neha Mathur, Assistant Professor, Jayoti Vidhyapeeth Women’s University, Jaipur (Rajasthan), India.
Manuscript received on 10 January 2019 | Revised Manuscript received on 20 January 2019 | Manuscript Published on 30 January 2019 | PP: 29-31 | Volume-8 Issue-2S2, January 2019 | Retrieval Number: 100.1/ijeat.B10060182S219/19©BEIESP
Open Access | Editorial and Publishing Policies | Cite | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The present invention relates to the “CMRR of Op-Amp” developed for Characteristics Improvement of Operational-Amplifier. CMMR is an acronym for Common Mode Rejection Ratio which is a measure of the capability of an op-amp to reject a signal that is common to both inputs [2,15]. Ideally, CMRR is infinite: if both inputs fluctuate by the same amount, then it will not affect the output. But practically its value depends on the circuit used and the value of its components [1, 11]. Practical value of CMRR is 90db, but this invention will improve its conventional value. In order to improve the performance of an Op-Amp, a method has been proposed, measurement setup has been improved to characterize CMRR more accurately according to its ideal value over wider frequency range. Practically op-amps have high CMRRs, the ubiquitous 741 has approximately 90 dB, and almost 3,000 devices are using this in terms of a ratio [3, 5]. CMRR can be enhanced up to 90 to 100 dB using the proposed method.
Keywords: Op-Amp, CMRR, dB.
Scope of the Article: Data Mining Methods, Techniques, and Tools