H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/116
H03K 7/06 (2006.01) G01J 1/42 (2006.01)
Patent
CA 1200853
ID-1004 CURRENT TO FREQUENCY CONVERTOR ABSTRACT A current to frequency convertor comprising a current source, for example a photocell, a voltage to frequency convertor, an integrator in the feedback loop of the convertor, the current source being connected to the summing junction of the convertor and integrator such that the frequency of output pulses from the convertor is directly proportional to the magnitude of current injected from the convertor to the summing junction, and a controlled circuit for attenuating the current injected from the convertor to the summing junction to increase the frequency of output pulses. The controlled attenuating circuit includes a transistor switching arrangement for introducing increased resistance in the path for current injected from the convertor to the summing junction in response to the presence of a control signal.
447794
Macrae & Co.
Warner Lambert Technologies Inc.
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