Title :
VHF/UHF high-Q bandpass tunable filters design using CMOS-inverter-based transresistance amplifiers
Author :
Lu, Ping-Hsing ; Wu, Chung-Yu ; Tsai, Ming-Kai
Author_Institution :
Inst. of Electron., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
30 May-2 Jun 1994
Abstract :
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
Keywords :
CMOS analogue integrated circuits; Q-factor; UHF filters; VHF filters; amplifiers; band-pass filters; biquadratic filters; circuit tuning; logic gates; 222.7 MHz; 368 MHz; CMOS inverter; VHF/UHF high-Q bandpass tunable filters; biquadratic filters; design; quality factor; transresistance amplifiers; Band pass filters; Broadband amplifiers; Inverters; MOSFETs; Q factor; Radio frequency; Transconductance; Tunable circuits and devices; VHF circuits; Voltage control;
Conference_Titel :
Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-1915-X
DOI :
10.1109/ISCAS.1994.409456
