Digital control type temperature-compensated crystal oscillator

Details Digital control type temperature-compensated crystal oscillator Digital control type temperature-compensated crystal oscillator

1992-01-13

1992-11-10

Mis, David

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

331158, H03B 532, H03L 102

Patent

active

051627582

ABSTRACT:
There are provided a memory for storing data for calculation of approximate temperature compensation data for the address data outside the temperature compensation range; a discriminator for discriminating whether the address data corresponding to the output from a temperature detector is within the temperature compensation range; a latch circuit for latching the data for calculation of approximate temperature compensation data at the start of operation; a calculator for calculating the approximate temperature compensation data in accordance with the latched data and the address data. The approximate temperature compensation data calculated by the calculator is output as a temperature compensation data when the discriminator discriminates that the address data is outside the temperature compensation range, and D/A converted the temperature compensation. The converted output is used as an oscillation frequency control voltage of the crystal oscillator.

REFERENCES:
patent: 5081431 (1992-01-01), Kubo et al.

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