Oscillators – With device responsive to external physical condition – Temperature or light responsive
Patent
1985-02-01
1987-05-19
LaRoche, Eugene R.
Oscillators
With device responsive to external physical condition
Temperature or light responsive
331111, 331143, 331176, H03L 102
Patent
active
046671714
ABSTRACT:
Changes in the output frequency of a voltage controlled oscillator circuit due to temperature changes are compensated for by shunting a resistor with two series diode resistor combinations. The variation in the diodes' voltage drip with temperature provides a resistance that varies with temperature, to correct for other resistance or capacitive changes with temperature in the circuit, thereby obtaining a more stable oscillator frequency in a varying temperature environment. Compensating for temperature effects by shunting a resistor with a means whose resistance decreases with temperature is a method applicable to circuits other that oscillators.
REFERENCES:
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patent: 3373379 (1968-03-01), Black
patent: 3742379 (1973-06-01), McLean
patent: 3835402 (1974-09-01), Kublick
patent: 3857110 (1974-12-01), Grebene
patent: 3902139 (1975-08-01), Harrell
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patent: 3906391 (1975-09-01), Murdock
patent: 3916342 (1975-10-01), Higuchi et al.
patent: 3996531 (1976-12-01), Witllinger
patent: 4264879 (1981-04-01), Duley
Honeywell Inc.
LaRoche Eugene R.
Pascal Robert J.
Ungemach Charles J.
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