Title :
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
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 90° phase difference are available from the configuration. The oscillation condition and the oscillation frequency (¿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;
Conference_Titel :
Integrated Circuits, ISIC '09. Proceedings of the 2009 12th International Symposium on
Conference_Location :
Singapore
Print_ISBN :
978-9-8108-2468-6
