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CMOS 공정을 이용한 15MHz, 2.6mW, 6차 대역통과 Gm-C 필터
유창식,정기욱,김원찬 대한전자공학회 1997 電子工學會論文誌, C Vol.c34 No.6
Low-voltage, low-power gm-C filter utilizing newly dveloped operational transconductance amplifier (OTA) is described in this paper. The OTA has only two MOS transistors in saturation region between $V_{DD}$ and GND, and thus low voltage operation is possible. To improve the linearity, the OTA is made differential. Common mode feedback, essential in differential circuit, requires no additional implemented in $0.8\mu\textrm{m}$ CMOS process, and the center frequency can be controlled from 15MHz with 3.0V single power supply.