Method and apparatus for providing a modified temperature compen

Details Method and apparatus for providing a modified temperature compen Method and apparatus for providing a modified temperature compen

1993-11-29

1995-06-27

Pascal, Robert J.

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

331 66, 331116R, H03L 100

Patent

active

054283191

ABSTRACT:
A modified temperature compensation signal (110) is provided in a temperature compensated crystal oscillator (TCXO) circuit (100) in the following manner. A temperature dependent current generator (104) produces a temperature compensation signal (108) whose amplitude changes responsive to changes in ambient temperature. The temperature compensation signal (108) is scaled, based on a plurality of discrete frequency adjust values (212), to produce the modified temperature compensation signal (110).

REFERENCES:
patent: 4254382 (1981-03-01), Keller et al.
patent: 5081431 (1992-01-01), Kubo et al.

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