Title :
Application of switched-capacitor resistors in RC oscillators
Author :
Viswanathan, T.R. ; Singhal, Kushagra ; Metzker, G.
Author_Institution :
University of Waterloo, Department of Electrical Engineering, Waterloo, Canada
Abstract :
The magnitude of a switched-capacitor resistor (sw.c.r.) is controlled by varying the switching frequency. Their use in RC oscillators enables the variation of the frequency of oscillation by changing the relatively high switching frequency. Since the high switching frequency is easily voltage-controlled, the low-frequency oscillator effectively becomes a v.c.o. giving a low-distortion sinusoidal waveform.
Keywords :
active filters; capacitors; resistors; switched filters; variable-frequency oscillators; RC oscillators; Wein bridge oscillator; automatic gain control; operational amplifier; switched capacitor resistor; switching arrangement; switching frequency;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19780442
