Filter with hysteresis for trip point applications

Details Filter with hysteresis for trip point applications Filter with hysteresis for trip point applications

1991-08-27

1993-08-03

Crosland, Donnie L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340501, 340511, 340661, 73308, 73304R, B60Q 100, G01F 2330

Patent

active

052333299

ABSTRACT:
A circuit including a sender providing a sender output signal responsive to a vehicle parameter, circuitry for providing an adjustable reference, circuitry for comparing the output signal to the adjustable reference and providing a comparison output signal therefrom, an up/down counter for filtering the comparison output signal, and circuitry for providing an indicator control signal in response to the filtered output signal and for controlling the adjustment of the adjustable reference, provides a signal to a vehicle operator that is both filtered and has hysteresis to minimize repeated switching of the signal between two states.

REFERENCES:
patent: 4246572 (1981-01-01), Larsen
patent: 4250750 (1981-02-01), Martinec et al.
patent: 4263583 (1981-04-01), Wyckoff
patent: 4614114 (1986-09-01), Matsumoto et al.
patent: 4635043 (1987-01-01), Kronenberg et al.
patent: 4757303 (1988-07-01), Scheidweiler
patent: 4760736 (1988-08-01), Huynh
patent: 4768377 (1988-09-01), Habelmann et al.

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