상세정보
학술대회
Modified-Nauta Operational Transconductance Amplifier for 400 MHz High-Q VHF Filter
- 발행일
- 200901
- 출처
- Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF) 2009, pp.132-135
- 협약과제
- 07MH1300, 홈네트워크용 Cognitive 무선 시스템 개발, 김재영
- 초록
- This paper proposes an efficient transconductor structure nearly free from the serious drawback of commonmode signal amplification at its output found in the conventional Nauta-OTA widely used for the implementation of VHF filter. A newly developed method mathematically clarifies the transfer characteristic of the proposed OTA and reveals the essential features of OTA/gyrator. In order to verify this scheme, we implemented a transconductor circuit and a lowpass filter based on the proposed concepts, using a compact circuit design that avoids CMFB circuit and parasitic poles. The measurement results of a 7th order Gm-C Chebyshev lowpass filter with cutoff frequency of 400MHz, are shown. ©2009 IEEE.
- KSP 제안 키워드
- Compact circuit, Cut-off frequency, Gm-C, High Q, Operational transconductance amplifier, circuit design, lowpass filter, measurement results, signal amplification, transfer characteristics