Apparatus and method for adjusting temperature compensated quart

Details Apparatus and method for adjusting temperature compensated quart Apparatus and method for adjusting temperature compensated quart

1998-04-22

2000-02-01

Mis, David

Oscillators

With device responsive to external physical condition

Temperature or light responsive

331 44, 331158, 331177V, 310315, 29593, H03B 504, H03B 532, H03B 536

Patent

active

060207914

ABSTRACT:
The frequency of a quartz oscillator having a trimmer 2, a quartz oscillator 3 on which its temperature characteristic is printed in the form of a bar code 6, and a storage device 4 is adjusted to a predetermined frequency, and the temperature at that time is measured by a noncontact temperature sensor of a frequency adjusting device 10, and is written into the storage device 4. The temperature characteristic of the quartz oscillator is read by a bar code reader 21, and optimally suited temperature compensating data is selected from among a plurality of pieces of temperature compensating data stored in advance in a temperature-compensating-data writing device. Further, a frequency deviation between the temperature at the time of adjustment and a standard temperature is calculated, and the temperature compensating data including that frequency deviation is stored in the storage device 4. The temperature characteristic of the quartz oscillator is compensated on the basis of the temperature compensating data corrected for the frequency deviation.

REFERENCES:
patent: 4746879 (1988-05-01), Ma et al.
patent: 4967165 (1990-10-01), Lee et al.
patent: 5392005 (1995-02-01), Bortoline et al.
patent: 5705957 (1998-01-01), Oka et al.

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