Design of electronically tunable first order allpass filter using OTAs with gain controllability

Author

Prommas, Thawach ; Jaikla, Winai ; Suwanjan, Peerawut ; Silapan, Phamorn

Author_Institution

Fac. of Ind. Educ., King Mongkut´s Inst. of Technol. Ladkrabang, Bangkok, Thailand

fYear

2013

fDate

4-6 Sept. 2013

Firstpage

350

Lastpage

353

Abstract

This paper presents current-mode first-order allpass filter using three operational transconductance amplifiers (OTAs) and grounded capacitor. The use of grounded capacitor makes the circuit more suitable for integrated circuit implementation. The current gain and phase shift can be independently controlled with electronic method. The circuit has high output impedance which enables easy cascading in the current mode circuits. The PSpice simulation results are depicted. The given results agree well with the theoretical anticipation.

Keywords

SPICE; all-pass filters; gain control; integrated circuits; operational amplifiers; phase shifters; OTA; PSpice simulation; analog signal processing; current gain; current mode; electronically tunable; first-order allpass filter; gain controllability; grounded capacitor; integrated circuit implementation; operational transconductance amplifiers; phase shift; phase shifters; Band-pass filters; Capacitors; Impedance; Integrated circuits; Oscillators; Transconductance; Current-mode; OTA; all-pass filter; first-order filter; integrated circuit;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Information Technologies (ISCIT), 2013 13th International Symposium on

Conference_Location

Surat Thani

Print_ISBN

978-1-4673-5578-0

Type

conf

DOI

10.1109/ISCIT.2013.6645880

Filename

6645880