Evaluation of a New Hybrid Technique Based on DTMOS and PFA to Improve Supply Voltage and Power Consumption of a Class-AB Amplifier
Journal of Electrical and Electronic Engineering
Volume 3, Issue 2-1, March 2015, Pages: 66-71
Received: Jan. 16, 2015;
Accepted: Jan. 19, 2015;
Published: Feb. 8, 2015
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Hossein Movahedi-Aliabad, Department of Electrical and Electronics, Quchan Technical Institute, Technical and Vocational University, Quchan, Iran
Akram Norouzi, Department of Electrical Engineering, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran
Sepideh Soltanmoradi, Department of Electrical Engineering, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran
Mahshid Nasserian, Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
Manijeh Shahi, Department of Electrical Engineering, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran
In this paper, two useful techniques of Dynamic Threshold Voltage MOSFET (DTMOS) and Positive Feedback Amplifier (PFA) are investigated separately and are applied simultaneously on a Class-AB Amplifier in the 180 nm CMOS technology. In the first proposed technique, Simulation results show that operating voltage can be limited to ±0.5 V in which the voltage gain and bandwidth are 52.6 dB and 103.51 MHz, respectively. In the second proposed technique, the power consumption is reduced more than 50%, the open-loop gain is enhanced 47% and Common Mode Rejection Ratio (CMRR) improves to 86.5 dB. By applying combination of these two techniques for designing the amplifier, CMRR increases to 92.1 dB and the power consumption reduces to 97 µW with the bandwidth of 59.12 MHz.
Evaluation of a New Hybrid Technique Based on DTMOS and PFA to Improve Supply Voltage and Power Consumption of a Class-AB Amplifier, Journal of Electrical and Electronic Engineering. Special Issue: Research and Practices in Electrical and Electronic Engineering in Developing Countries.
Vol. 3, No. 2-1,
2015, pp. 66-71.
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