Accession Number:

ADD013414

Title:

Digitally Controlled Temperature Compensated Oscillator System.

Descriptive Note:

Patent, Filed 7 Nov 80, patented 19 Apr 83,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Report Date:

1983-04-19

Pagination or Media Count:

7.0

Abstract:

A crystal oscillator that is temperature compensated by digitally substracting a correction frequency from the running frequency of the crystal oscillator to provide the required operating frequency. The correction frequency is generated by a digital frequency synthesizer circuit which is controlled by the output of a programmable read-only memory which has been programmed to generate the required correction frequency for each temperature code over the operating temperature range. The temperature code is generated by gating a digital counter with the output of a monostable multivibrator which utilizes a thermistor to make its gate interval proportional to temperature.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE