Signal conditioning circuit for magnetic sensing means

Details Signal conditioning circuit for magnetic sensing means Signal conditioning circuit for magnetic sensing means

1977-08-29

1979-09-25

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307358, 307264, 328151, 328165, H03K 5153

Patent

active

041692322

ABSTRACT:
A signal conditioning circuit for the output of a magnetic position sensor is disclosed. The magnetic sensor generates a total output signal that increases as a function of the rotational velocity of the sensor with a spurious noise component that is a relatively constant percentage of the actual signal voltage over the speed range. In a preferred embodiment, the signal conditioning circuit discriminates between the noise component and the signal component by comparing the total signal to a variable threshold only after a positive going zero cross. The variable threshold is generated as a function of the peak amplitude of the total signal. In a second embodiment the signal conditioning circuit includes gain control means which varies the amplitude of the total output signal as a function of its peak to maintain the threshold above the noise component.

REFERENCES:
patent: 3348065 (1967-10-01), Schmidt
patent: 3582679 (1971-06-01), Carp et al.
patent: 3610956 (1971-10-01), Giordano et al.

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