Temperature compensating circuit for use with crystal oscillator

Details Temperature compensating circuit for use with crystal oscillator Temperature compensating circuit for use with crystal oscillator

1981-11-12

1984-06-26

Grimm, Siegfried H.

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

331 66, 310315, H03L 102

Patent

active

044568924

ABSTRACT:
A temperature compensating circuit for a piezoelectric crystal includes a thermistor circuit coupled to a transistor to cause the output voltage derived from the transistor to decrease as the temperature increases from a cold temperature toward a middle temperature. As the temperature increases still more, the thermistor causes the transistor to become saturated, and its output voltage increases. An additional thermistor circuit is coupled to the transistor output to cause the output voltage to decrease as the temperature increases toward a warm temperature from the temperature at which the transistor became saturated.

REFERENCES:
patent: 3373379 (1968-03-01), Black
patent: 3454903 (1969-07-01), Page
patent: 3831111 (1974-08-01), Lafferty
patent: 3970966 (1976-07-01), Keller et al.
patent: 4096452 (1978-06-01), Waku et al.

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