Title :
Approach to the realization of state variable based oscillators
Author :
Martìnez, P.A. ; Aldea, C. ; Sabadell, J. ; Celma, S.
Author_Institution :
Fac. de Ciencias, Zaragoza Univ., Spain
Abstract :
An approach to the synthesis of variable frequency oscillators (VFOs) is proposed. As a starting point, this method describes VFOs independently of active elements and particular implementations are then discussed. Furthermore, the technique allows us to unify apparently different VFOs in the same class and to classify them according to their practical applications. First, sinusoidal oscillator synthesis associated with biquadratic filters is described. Then, practical implementations of the oscillator are considered based on OTAs and CCII based integrators
Keywords :
biquadratic filters; current conveyors; variable-frequency oscillators; waveform generators; CCII based integrators; OTAs; VFOs; biquadratic filters; sinusoidal oscillator synthesis; state variable based oscillator synthesis; variable frequency oscillators; Band pass filters; Bipolar integrated circuits; Equations; Filtering theory; Frequency synthesizers; Monolithic integrated circuits; Operational amplifiers; Oscillators; Transconductance; Transfer functions;
Conference_Titel :
Electronics, Circuits and Systems, 1998 IEEE International Conference on
Conference_Location :
Lisboa
Print_ISBN :
0-7803-5008-1
DOI :
10.1109/ICECS.1998.813953
