Temperature-stable tuned-circuit oscillator, especially in a proximity switch
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United States of America Patent
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Jan 11, 1994
Grant Date -
N/A
app pub date -
Jul 12, 1991
filing date -
Jan 13, 1989
priority date (Note) -
Expired
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Abstract
The invention relates to a temperature-stable transistorised tuned-circuit oscillator. Provided for the purpose of temperature stabilisation of the tuned-circuit voltage is a transistor T2, which is thermally coupled to the tuned-circuit coil L and controls a current source Q in the circuit of the oscillator L, C1, T1, in such a way that temperature-induced variations of the data of the tuned-circuit coil L are compensated.
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