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저전압 동작을 위한 대역폭 향상형 순환 충전 부동 인버터 증폭기
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- Authors
- 김유빈, 문성모, 박창주
- Issue Date
- 2026-06
- Citation
- 대한전자공학회 학술 대회 (하계) 2026, pp.1-4
- Publisher
- 대한전자공학회
- Language
- Korean
- Type
- Conference Paper
- Abstract
- This paper presents a bandwidth-enhanced cyclically charged floating-inverter amplifier (CCFIA) for low-supply-voltage mixed-signal systems. Inverter-based amplifiers achieve high current efficiency through current reuse; however, their operation is limited by the reduced voltage headroom in scaled CMOS technologies. To alleviate this constraint, the proposed modified CC-FIA employs series-connected reservoir capacitor arrays that increase the effective supply voltage across the floating-inverter core during amplification, thereby enabling operation from a low supply voltage of digital systems. The proposed amplifier also provides digitally adjustable bandwidth without requiring a static bias current source. Designed in a 65-nm CMOS process, the proposed amplifier reduces the required supply voltage by 43.3% compared with a conventional CC-FIA while achieving the same average −3dB bandwidth.
- KSP Keywords
- CMOS Technology, Current source, Inverter-based, Low supply voltage, Through current, current efficiency, current reuse, digital system, mixed signal, series-connected