CDBA-based sinusoidal quadrature oscillator with current controlled amplitude

Author

Prasertsom, Danucha ; Tangsrirat, Worapong

Author_Institution

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

fYear

2010

Firstpage

187

Lastpage

191

Abstract

This paper describes a sinusoidal quadrature oscillator circuit using current differencing buffered amplifiers (CDBAs), that features a single-resistance-controlled frequency and current amplitude control. The proposed circuit contains two CDBAs, three resistors, and two grounded capacitors. The oscillation condition (OC) and the oscillation frequency (ω_o) of the circuit are independently controlled by a single resistor, whereas the oscillation amplitude is electronically controlled by an external DC current. Outputs of two sinusoidal voltages are shifted by 90°. The validity of the proposed circuit has been verified by hardware circuit tests using AD844 based CDBA.

Keywords

amplifiers; capacitors; oscillators; resistors; AD844 based CDBA; CDBA-based sinusoidal quadrature oscillator; current controlled amplitude; current differencing buffered amplifiers; external DC current; grounded capacitors; hardware circuit tests; oscillation amplitude; oscillation condition; oscillation frequency; single resistor; single-resistance-controlled frequency; sinusoidal quadrature oscillator circuit; sinusoidal voltages; Capacitors; Equations; Filtering theory; Frequency control; Integrated circuits; Oscillators; Resistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Information Technologies (ISCIT), 2010 International Symposium on

Conference_Location

Tokyo

Print_ISBN

978-1-4244-7007-5

Electronic_ISBN

978-1-4244-7009-9

Type

conf

DOI

10.1109/ISCIT.2010.5664835

Filename

5664835