DocumentCode :
3568852
Title :
Exact calculation of amplitudes and frequency of RC-oscillator with quadrature outputs
Author :
Oliveira, Lu?­s Bica ; Filanovsky, I.M. ; Verhoveven, C.J.M.
Author_Institution :
INESC, Lisboa, Portugal
Volume :
1
fYear :
2004
Abstract :
A calculation of exact frequency and amplitudes in an RC-oscillator with quadrature outputs is given. The oscillator includes two multivibrators synchronized by the cross-coupling comparators measuring the voltages at the timing capacitors and providing coupling currents in the collector resistors of the multivibrators. It is shown that the outputs are in quadrature only when both multivibrators are symmetric (yet the parameters of one multivibrator may be different from the parameters of another). The theoretical results are confirmed by simulation.
Keywords :
RC circuits; capacitors; circuit simulation; comparators (circuits); coupled circuits; multivibrators; oscillators; resistors; synchronisation; RC oscillator; amplitude calculation; circuit simulation; collector resistors; cross coupling comparators; frequency calculation; multivibrators; quadrature oscillator; synchronization; timing capacitors; Capacitors; Circuit simulation; Coupling circuits; Current measurement; Frequency synchronization; Resistors; Signal design; Timing; Voltage; Voltage-controlled oscillators;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on
Print_ISBN :
0-7803-8346-X
Type :
conf
DOI :
10.1109/MWSCAS.2004.1354015
Filename :
1354015
Link To Document :
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