Crystal oscillating device and method of adjusting said crystal

Details Crystal oscillating device and method of adjusting said crystal Crystal oscillating device and method of adjusting said crystal

1997-11-05

1999-02-23

Mis, Daivd

Oscillators

With device responsive to external physical condition

Temperature or light responsive

331 68, 331108D, 331116FE, 331158, 331176, 331179, 331177V, H03B 504, H03B 536

Patent

active

058748644

ABSTRACT:
A control circuit includes: a temperature 30; a temperature sensing section 32; a memory 36, an amplifying section 31 to which the memory and the temperature sensor are electrically connected; a first D/A converting section 38 electrically interposed between the memory and the temperature sensing section; a second D/A converting section electrically interposed between the memory and the amplifying section 31, The amplifying section 31 includes: a polarity inverting circuit 33 connected to the temperature sensor; and a variable attenuator 34, an offset adjusting circuit 100, and an amplifying circuit 35 that are connected sequentially to the polarity inverting circuit. The amplifying section 31 is connected to a sample hold circuit 41 through a displacement buffering means 101. The memory has 8 or less working control voltage setting groups.

REFERENCES:
patent: 5668506 (1997-09-01), Watanabe et al.

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