Low-gain, range programmable, temperature compensated voltage co

Details Low-gain, range programmable, temperature compensated voltage co Low-gain, range programmable, temperature compensated voltage co

1992-07-16

1994-05-31

Grimm, Siegfried H.

Oscillators

Ring oscillators

331 25, 331 36C, 331108B, 331176, 331177V, H03B 504, H03L 102, H03L 7099

Patent

active

053172876

ABSTRACT:
A multirange low-gain voltage controlled ring oscillator generates a substantially temperature-independent oscillator signal. Each frequency range is formed by utilizing a selected value of a voltage variable resistance in each stage of the ring oscillator. The oscillator signal is made to be substantially temperature-independent by utilizing a substantially temperature-independent constant current source to source a fixed current through the variable resistance and a temperature varying current which sinks and sources additional current to the oscillating circuit as temperature rises and falls, respectively.

REFERENCES:
patent: 3978431 (1976-08-01), Lattin
patent: 4547749 (1985-10-01), Kuo
patent: 5180995 (1993-01-01), Hayashi et al.

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