Crystal oscillator with a temperature-compensating analog circui

Oscillators – Frequency stabilization – Temperature or current responsive means in circuit

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Details

331158, 331116R, 331 66, 331177V, H03B 532

Patent

active

058835504

ABSTRACT:
A temperature-compensated quartz oscillator comprises a stabilized power supply circuit (1) for supplying a constant voltage, an oscillation circuit (2) comprising a quartz resonator (21) and a varicap (22), a temperature detecting circuit (3) for producing a detected voltage signal (V.sub.Temp) corresponding to an oscillator part temperature by the use of the temperature-voltage characteristic of a temperature detecting element located in the vicinity of the oscillation circuit (2), and a temperature characteristic compensating portion (4) for producing through analog processing of the detected voltage signal (V.sub.Temp) a varicap control voltage signal (V.sub.VR) to be supplied to the varicap (22).

REFERENCES:
patent: 5473289 (1995-12-01), Ishizaki et al.

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