Pulse width demodulation device and method

Details Pulse width demodulation device and method Pulse width demodulation device and method

1996-02-05

1998-10-06

Evans, F. L.

Registers

Coded record sensors

Particular sensor structure

G06K 710

Patent

active

058180249

ABSTRACT:
A sensor having an input and an output, wherein the output produces a signal transition whenever the sensor input traverses an indicia placed within a spaced plurality of indicia of varying widths. A logic unit is coupled to produce an interrupt signal and a timer control signal during the signal transition. A microcontroller having an interrupt control and a timer control unit is provided for processing a first timed value and compiling a second timed value upon receiving the interrupt signal and the timer control signal from the logic unit.

REFERENCES:
patent: 3619569 (1971-11-01), Hoehn et al.
patent: 4128892 (1978-12-01), Vasa
patent: 4717818 (1988-01-01), Broockman et al.
patent: 4768163 (1988-08-01), Clark et al.
International Search Report for PCT/US 97/01379 received Sep. 10, 1997.

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