Variable reluctance transducer processing circuit for providing

Details Variable reluctance transducer processing circuit for providing Variable reluctance transducer processing circuit for providing

1989-10-04

1991-04-30

Snow, Walter E.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324173, 32420712, 32420725, 324225, G01P 348, G01P 354, G01N 2772, G01B 714

Patent

active

050122070

ABSTRACT:
A circuit for processing a high frequency output signal from a variable reluctance transducer, this signal including an unwanted low frequency component, comprises a comparator having a first input receiving the transducer signal and a second input receiving the same transducer signal but via a low pass filter. The comparator therefore provides an output representing the high frequency variations in the transducer signal and substantially unaffected by the low frequency component. Alternatively, the transducer signal may be applied to a circuit providing a first output signal varying as the low frequency component and also providing a second output signal varying as the high frequency variations in the received transducer signal, the first output signal being used as a feedback control which tends to render the second output signal free of low frequency variations.

REFERENCES:
patent: 4575677 (1986-03-01), Dennis

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