Period-modulated voltage controlled oscillator

Details Period-modulated voltage controlled oscillator Period-modulated voltage controlled oscillator

1978-05-04

1979-12-11

Grimm, Siegfried H.

Oscillators

With frequency adjusting means

With voltage sensitive capacitor

307228, 331 74, 331116R, H03B 304

Patent

active

041785673

ABSTRACT:
An oscillator for producing an output whose frequency varies in correspondence with changes in the level of an input voltage, and which includes a base or clock oscillator operating at a fixed frequency, a counter operable to count a predetermined number of oscillations of said base oscillator to thereby measure a base time period, a ramp generator controlled by the input voltage signal and acting to produce a voltage ramp continuing for a period whose duration varies in accordance with variations in the level of the voltage signal, and means for producing an oscillating output signal having a period which includes a combination of the base period as determined by the counter and the variable period measured by the ramp generator.

REFERENCES:
patent: 3351873 (1967-11-01), Kimura
patent: 3568086 (1971-03-01), Perry
patent: 3842371 (1974-10-01), Kelley

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