Adjustable frequency oscillator

Details Adjustable frequency oscillator Adjustable frequency oscillator

1983-06-30

1985-06-04

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331111, 331143, H03K 3023

Patent

active

045217483

ABSTRACT:
An adjustable frequency oscillator 2 is provided by a comparator timer 4 having a potentiometer 6 at its output 8 for concurrently changing both charging current and threshold trip voltage to control the frequency of oscillation of the comparator output. The oscillator is ideal for proximity switch applications, particularly photoelectric type proximity switches, for timing a delayed output signal following a given sensed condition.

REFERENCES:
patent: 3555469 (1971-01-01), Harvey, Jr.
patent: 3713046 (1973-01-01), Wong et al.
patent: 3895315 (1975-07-01), Way
Bergman, "Centre-Zero Potentiometer-Controlled Oscillator", New Electronics, vol. 13, No. 13, Jun. 24, 1980, p. 86.
"Variable Pulse Width Generator", Elektor, Jul./Aug. 1980, pp. 7-74.

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