Title :
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
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;
Conference_Titel :
Communications and Information Technologies (ISCIT), 2013 13th International Symposium on
Conference_Location :
Surat Thani
Print_ISBN :
978-1-4673-5578-0
DOI :
10.1109/ISCIT.2013.6645880