Conversion of quadrature signals into counter control pulses

Details Conversion of quadrature signals into counter control pulses Conversion of quadrature signals into counter control pulses

1983-10-24

1986-07-08

Shaw, Clifford C.

Communications: electrical

Audible indication

Percussion-type sound producer

328133, H03K 526

Patent

active

045996008

ABSTRACT:
A method and apparatus for conversion of quadrature signals into counter control pulses including count and direction pulses. The method includes the steps of determining the relative states of the two quadrature pulses and which of the two had the transition, comparing these two determinations to resolve direction, and generation of a count pulse for every quadrature transition. The apparatus includes logic components which provide quadrature counting with an anti-jitter feature by change of the direction of transition on either input. By a technique of dynamically operating on both edges of the quadrature pulse train and the count signal, the counter control signals are produced without storage of the quadrature train or the need to know the current state of the quadrature train.

REFERENCES:
patent: 4300039 (1981-11-01), Avins
patent: 4308500 (1981-12-01), Avins
patent: 4328463 (1982-05-01), Avins
patent: 4379221 (1983-04-01), Avins et al.
patent: 4442532 (1984-04-01), Takemura
patent: 4446389 (1984-05-01), Williams et al.

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