Binary digitizer circuit for voltages developed across induction

Details Binary digitizer circuit for voltages developed across induction Binary digitizer circuit for voltages developed across induction

1989-09-06

1990-11-20

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307519, 307359, 307551, H03K 906, H03K 504

Patent

active

049720953

ABSTRACT:
A pulse shaper is disclosed which shapes a vehicle speed signal developed by a tachometer and pulsating with a frequency which is proportional to a vehicle speed into a rectangular wave pulse. A reference potential line is biased above a common potential. The vehicle speed signal has its level clamped to a range from 0.6 V below to 0.6 V above the potential of the reference potential line. A first IC comparator digitizes the clamped speed signal into a binary form around the potential of the reference potential line. When the reference potential line becomes short-circuited to the common potential. The clamped vehicle speed signal which is applied to the inverting input of the first comparator reduces below the common potential, giving rise to the likelihood of an erroneous pulse. A second IC comparator then detects a reduction in the potential of the reference potential line to constrain the output of the first comparator to an L level, preventing an erroneous pulse from being delivered.

REFERENCES:
patent: 3740586 (1973-06-01), Banks et al.
patent: 4243940 (1987-01-01), Ruof
patent: 4375599 (1983-03-01), Bleckmann et al.
patent: 4823060 (1989-04-01), Doemen

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