Accelerated warm-up crystal oven

Details Accelerated warm-up crystal oven Accelerated warm-up crystal oven

1981-01-21

1983-08-02

Grimm, Siegfried H.

Oscillators

With outer casing or housing

With temperature modifier

219210, 331176, H03B 532, H03L 104

Patent

active

043968929

ABSTRACT:
Temperature stability is quickly achieved for a crystal oscillator mounted in a warm-up crystal oven because the heat is applied proportionally to the mass of the oscillator and circuitry during the initial warm-up period of time and then applied proportionally to the area that will allow compensation for thermal loss after the warm-up period. The oscillator crystal is encapsulated within a case along with an oscillator circuit for the oscillator crystal that is thermally mounted to the case. A controlled heater heats the warm-up crystal oven and crystal oscillator. The controlled heater is controlled by a temperature controller that responds to a first thermal sensor that senses the temperature of the case and a second thermal sensor that senses the temperature of the controlled heater.

REFERENCES:
patent: 3158821 (1964-11-01), Sulzer
patent: 3550006 (1970-12-01), Harner
patent: 4317985 (1982-03-01), Wilson

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