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VHF/UHF high-Q bandpass tunable filters design using CMOS-inverter-based transresistance amplifiers

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3 Author(s)
Ping-Hsing Lu ; Inst. of Electron., Nat. Chiao Tung Univ., Hsinchu, Taiwan ; Chung-Yu Wu, Ph.D. ; Tsai, M.-K.

A new CMOS inverter-based wideband transresistance (Rm) amplifier is proposed and analyzed. Using the Rm amplifier, tunable VHF/UHF Rm-C bandpass biquadratic filters can be designed. In these filters, the center frequency f0 can be post-tuned by adjusting the control voltages of the Rm amplifier. Experimental results have shown that the single-ended-output Rm-C bandpass biquad has the center frequency f0=368 MHz and the quality factor Q=1.95 whereas the fully-differential-output configuration has Q=360 and f0=222.7 MHz

Published in:

Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on  (Volume:5 )

Date of Conference:

30 May-2 Jun 1994