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학술대회 Modified-Nauta Operational Transconductance Amplifier for 400 MHz High-Q VHF Filter
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저자
박정우, 김천수, 유현규
발행일
200901
출처
Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF) 2009, pp.132-135
DOI
https://dx.doi.org/10.1109/SMIC.2009.4770517
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.
키워드
Filter, Gyrator, Nauta, Transconductor
KSP 제안 키워드
Compact circuit, Cut-off frequency, Gm-C, High Q, Low Pass Filter, Operational transconductance amplifier, circuit design, measurement results, signal amplification, transfer characteristics