New Universal Biquads Employing CFOAs

Author

Singh, V.K. ; Singh, A.K. ; Bhaskar, D.R. ; Senani, Raj

Author_Institution

Dept. of Electron. & Commun. Eng., Inst. of Eng. & Technol., Lucknow

Volume

53

Issue

11

fYear

2006

Firstpage

1299

Lastpage

1303

Abstract

Four new single-input-multi-output-type universal biquad filters using current-feedback operational amplifiers (CFOAs) are presented, which realize all the five standard filter functions (namely, low-pass, bandpass, high-pass, notch, and all-pass) from the same configuration, provide tunability of the various filter parameters in all the five responses, and offer a resistive or ideally infinite input impedance while employing only four CFOAs and two grounded capacitors as preferred for integrated circuit implementation. The workability of the new biquads has been verified by hardware implementations and SPICE simulations based upon AD844-type CFOAs, and some sample results are presented

Keywords

all-pass filters; band-pass filters; biquadratic filters; circuit tuning; high-pass filters; low-pass filters; notch filters; operational amplifiers; CFOA; SPICE simulations; all-pass filter; analog circuit design; bandpass filter; current-feedback operational amplifiers; filter tunability; high-pass filter; low-pass filter; notch filter; universal biquad filters; Active filters; Band pass filters; Capacitors; Circuit synthesis; Hardware; Impedance; Low pass filters; Operational amplifiers; SPICE; Workability; Analog circuit design; biquad filters; current-feedback operational amplifiers (CFOAs);

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2006.882345

Filename

4012401