Electronically Tunable Four Phase Quadrature Oscillator Employing Current-Controlled Current Conveyor Transconductance Amplifiers

Author

Tanaphatsiri, Chaiya ; Jaikla, Winai

Author_Institution

Program in Electron. & Telecommun. Eng., RMUTSV, Songkhla, Thailand

fYear

2011

fDate

17-19 Jan. 2011

Firstpage

89

Lastpage

92

Abstract

A current-mode four-phase quadrature oscillator using 2 current controlled current conveyor transconductance amplifiers (CCCCTAs) and 2 grounded capacitors is presented. The proposed oscillator can provide 4 sinusoidal output currents with 90° phase difference. The oscillation condition and oscillation frequency can be electronically/independently controlled by adjusting the bias current of the CCCCTA. High output impedances of the configuration enable the circuit to be cascaded without additional current buffers. The use of only grounded capacitors is ideal for integration. The PSpice simulation results are depicted. The given results agree well with the theoretical anticipation.

Keywords

capacitors; current conveyors; operational amplifiers; oscillators; PSpice simulation; current-controlled current conveyor transconductance amplifiers; current-mode four-phase quadrature oscillator; electronically tunable four phase quadrature oscillator; grounded capacitors; Capacitors; Frequency control; Integrated circuit modeling; Oscillators; Resistors; Simulation; Transconductance; CCCCTA; current-mode; oscillator;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Design, Test and Application (DELTA), 2011 Sixth IEEE International Symposium on

Conference_Location

Queenstown

Print_ISBN

978-1-4244-9357-9

Type

conf

DOI

10.1109/DELTA.2011.25

Filename

5729546