Title :
Wein-bridge oscillators with opamp independent oscillation frequency
Author :
Carlosena, A. ; Martinez, P. ; Porta, S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Zaragoza Univ., Spain
fDate :
6/1/1991 12:00:00 AM
Abstract :
A new set of 12 sinusoidal oscillators is introduced. These oscillators use two opamps and their oscillation frequency is dependent of the gain-bandwidth products of these active elements where a single-pole rolloff model is considered. This property is achieved by virtue of the configurations introduced by the authors, i.e., no adjustment is required. The proposed oscillators have been experimentally tested using a simple automatic gain-control scheme
Keywords :
bridge circuits; frequency stability; operational amplifiers; oscillators; Wein-bridge oscillators; automatic gain-control; gain-bandwidth products; opamp independent oscillation frequency; single-pole rolloff model; sinusoidal oscillators; stability; Capacitors; Chromium; Circuits; Filtering theory; Frequency; Impedance; Oscillators; Passive networks; Predictive models; Transfer functions;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
