Temperature-stabilized oscillator circuit having heating element

Details Temperature-stabilized oscillator circuit having heating element Temperature-stabilized oscillator circuit having heating element

1994-01-07

1995-11-14

Lee, Benny

Oscillators

With temperature modifier

331 66, H03B 100

Patent

active

054670594

ABSTRACT:
In an oscillator circuit (VCOS) having at least one heating element (HE) that keeps the temperature constant, the clock signals (ts) that are formed are conducted via an output connection (AV) to an output (TA) of the oscillator circuit (VCOS). An impedance evaluation unit (WAE) is inserted into this output connection (AV) and detects changes in an impedance or of a resistor (R4, R5) connected to the output (TA) and the heating element (HE) is activated or deactivated in response to changes in the impedance.

REFERENCES:
patent: 3287658 (1966-11-01), Sulzer
patent: 4216371 (1980-08-01), Marotel
patent: 4839613 (1989-06-01), Echols et al.
patent: 4893097 (1990-01-01), Zwack
patent: 4985687 (1991-01-01), Long

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