A Novel High ICMR and High Frequency Response of an Inverting Summing OpAmp
Dhanalakshmi Manikyam1, Ganesh Kumar Ganjakunta2
1Dhanalakshmi Manikyam, Electronics and Communication Engineering, Sree Vidyaniketan Engineering College, Tirupati , India.
2Ganesh Kumar G, Electronics and Communication Engineering, Sree Vidyaniketan Engineering College, Tirupati, India.
Manuscript received on April 05, 2013. | Revised Manuscript received on April 29, 2013. | Manuscript published on May 05, 2013. | PP: 294-296 | Volume-3, Issue-2, May 2013. | Retrieval Number: B1546053213/2013©BEIESP
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© The Authors. Published By: 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: In this paper, we propose a novel high ICMR (input common mode range) and high frequency response of an inverting summing pomp (operational amplifier). While selecting an operational amplifier for circuit design the most critical parameters must be consider. Some of the parameters are supply voltage, gain-bandwidth product, input noise voltage, slew rate, PSRR (power supply rejection ratio) and CMRR (common mode rejection ratio). The most important parameter is input common mode range, if we violate this parameter leads an undistorted waveform at the output stage. This leads an impact on the frequency response. Perhaps too much capacitance on the output stage causing clipping or oscillations on the output waveform. This paper work estimates the increasing the ICM range value by cascading the output stage combined with unusual implementation of differential amplifier to get better frequency response than conventional inverting summing operational amplifier.
Keywords: Amplifier, CMRR, Gain, ICMR, OpAmp.