Circuit for generating a stable control signal

Details Circuit for generating a stable control signal Circuit for generating a stable control signal

1990-06-27

1991-08-13

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

331 20, 331 36C, H03L 7099

Patent

active

050399551

ABSTRACT:
A circuit for generating a control signal includes a frequency-determining element (C3), a clock generator for generating a clock signal and a control circuit coupled to the clock generator for generating a control signal as a function of the magnitude of the voltage at the frequency-determining element and for applying the control signal to the frequency-determining element. The control circuit includes a sawtooth generator having a sawtooth frequency-determining element (C1) for converting the clock signal into a second signal having a constant slope as a function of time, and a storage element (C2) which produces a voltage that depends on the amplitude of the sawtooth signal.

REFERENCES:
patent: 3364431 (1968-01-01), Doble et al.
patent: 4634939 (1987-01-01), Dietz

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