Current-controlled quadrature oscillator using only CCCDBAs

Author

Sonjoi, Winyu ; Tangsrirat, Worapong ; Surakampontorn, Wanlop

Author_Institution

Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang (KMITL), Bangkok, Thailand

fYear

2009

fDate

14-16 Dec. 2009

Firstpage

385

Lastpage

388

Abstract

An electronically tunable quadrature oscillator using only two current-controlled current differencing buffered amplifiers (CCCDBAs) and two grounded capacitors without external passive resistor is proposed. The outputs of two sinusoidal waveforms with 90Â° phase difference are available from the configuration. The oscillation condition and the oscillation frequency (Â¿_o) of the proposed oscillator circuit are tunable by electronically through controlling the external DC bias currents of the CCCDBAs. The simulation results with PSPICE are used to verify the theory.

Keywords

amplifiers; capacitors; oscillators; PSPICE; current-controlled current differencing buffered amplifiers; current-controlled quadrature oscillator; electronically tunable quadrature oscillator; external DC bias currents; external passive resistor; grounded capacitors; oscillation frequency; phase difference; sinusoidal waveforms; Analog circuits; Capacitors; Circuit simulation; Displays; Employment; Frequency; Resistors; SPICE; Tunable circuits and devices; Voltage-controlled oscillators; Current-Controlled Current Differencing Buffered Amplifier (CCCDBA); Quadrature Oscillator (QO); Voltage-Mode Circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Circuits, ISIC '09. Proceedings of the 2009 12th International Symposium on

Conference_Location

Singapore

Print_ISBN

978-9-8108-2468-6

Type

conf

Filename

5403882