Oscillator circuit with volatge controlled frequency

Details Oscillator circuit with volatge controlled frequency Oscillator circuit with volatge controlled frequency

1991-08-22

1992-09-08

Mis, David

Oscillators

Electromechanical resonator

Crystal

331 44, 331116R, 331177V, 331185, H03B 536

Patent

active

051461897

ABSTRACT:
An oscillator circuit with a voltage controlled oscillator (VCO) comprises a range changing circuit that adapts the d.c. control voltage of the circuit to a control signal suitable for adjusting the VCO to the full frequency range. The voltage level for the control signal can be outside the voltage range delimited by the supply voltages for the circuit. In order to obtain a voltage supply of a sufficient voltage level the output signal of the VCO is used as the input of an a.c. to d.c. converter that provides the necessary higher supply voltage for the range changing circuit.

REFERENCES:
patent: 3569866 (1971-03-01), Hearn
patent: 3815052 (1974-06-01), Watatani et al.
patent: 3911378 (1975-10-01), Buchanan
Cakulev, T. I. et al., "High-Performance Voltage-to-Frequency Converter" Electronics Engineering; Mar. 1969, pp. 346-348.

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