Journal
IET CIRCUITS DEVICES & SYSTEMS
Volume 13, Issue 5, Pages 614-621Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-cds.2018.5038
Keywords
CMOS integrated circuits; operational amplifiers; mixed analogue-digital integrated circuits; gain 84; 0 dB; size 180 nm; voltage 1; 8 V; two-stage class-AB OTA; 1P6M CMOS technology; power dissipation; analogue circuits; operational transconductance amplifiers; class-AB operation; mixed-signal circuits
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2017R1A2B3008718]
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Operational trans-conductance amplifiers (OTAs) are an essential building block in analogue and mixed-signal circuits. In this study, a new two-stage class-AB OTA is proposed. The class-AB operation is obtained without extra power dissipation, and without unity-gain bandwidth or noise degradation. The circuit was fabricated using 1P6M 180-nm CMOS technology under 1.8 V supply voltage. The measurement results indicate 13 dB enhancement in DC-gain and 1.8 times improvement in slew rate compared to its conventional counterpart. Comparison results indicate that the proposed OTA demonstrates better performance than the state-of-the-art designs.
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