Frequency controlled switch

Details Frequency controlled switch Frequency controlled switch

1995-12-06

1998-07-14

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By frequency

327399, 327427, H03K 906, H03K 1700

Patent

active

057810397

ABSTRACT:
A method and an apparatus in testing whether the frequency of an incoming signal is higher or lower than a predetermined value. The method only demands a capacitor (C), a resistor (R), a field effect transistor (Q) and a constant current generator (I). Because the included capacitor only needs to have a small value, a circuit design according to the method is very suitable for integration, for example, in form of a monolithic integrated circuit for frequency control in connection to DC/DC converters.

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