Title :
A versatile current-mode biquad using operational amplifiers
Author :
Shiwen, Yuan ; Tsuiki, Sumio ; Ishida, Masaru ; Fukui, Yutaka
Author_Institution :
Northeast Inst. of Heavy Machinery, Furaruki, China
Abstract :
A versatile current-mode biquad filter using three operational amplifiers and 9 passive elements is proposed. By the suitable choice of the output branch, lowpass, bandpass, highpass, bandstop and allpass transfer functions are realized simultaneously without changing the circuit configuration and elements. Two circuits, one is for low frequency application and the other for high frequency, are proposed. The center frequency, quality factor and gain constants of the circuit can be tuned independently. Simulated results will show that the circuits work successfully
Keywords :
all-pass filters; band-pass filters; band-stop filters; biquadratic filters; high-pass filters; low-pass filters; operational amplifiers; transfer functions; allpass transfer function; bandpass transfer function; bandstop transfer function; center frequency; current-mode biquad filter; gain constants; high frequency circuit; highpass transfer function; low frequency circuit; lowpass transfer function; operational amplifiers; passive elements; quality factor; simulation; tuning; Band pass filters; Current mode circuits; Frequency; Machinery; Operational amplifiers; Passive filters; Q factor; Transfer functions; Tuned circuits; Voltage;
Conference_Titel :
Circuits and Systems, 1994. APCCAS '94., 1994 IEEE Asia-Pacific Conference on
Conference_Location :
Taipei
Print_ISBN :
0-7803-2440-4
DOI :
10.1109/APCCAS.1994.514618
