Method and device for controlling the heating of a thermostatica

Details Method and device for controlling the heating of a thermostatica Method and device for controlling the heating of a thermostatica

1984-10-15

1986-09-09

Grimm, Siegfried H.

Oscillators

With outer casing or housing

With temperature modifier

219210, 310343, 331176, H03L 104

Patent

active

046111824

ABSTRACT:
A method and a device for regulating the heating of a thermostatically controlled enclosure of a quartz oscillator. During a first stage, the thermostatically controlled enclosure is exposed to an external temperature close to the maximum operating temperature and the frequency of the oscillator is measured. During a second stage, the thermostatically controlled enclosure is exposed to an external temperature close to the minimum temperature of the range and the difference between the frequency of the oscillator and the frequency previously measured is cancelled out by modifying the distribution of the powers dissipated by the heating elements of the thermostatically controlled enclosure. The heating of the enclosure is performed by a chain of voltage stabilizer semiconductor circuits connected in series, each of the circuits being traversed by a regulated heating current. The regulating of the heating action is performed by modifying the stabilized voltages of the circuits.

REFERENCES:
patent: 4216371 (1980-08-01), Marotel

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