Signal processing circuit for an encoder

Details Signal processing circuit for an encoder Signal processing circuit for an encoder

1989-07-07

1991-01-22

Shoop, Jr., William M.

Coded data generation or conversion

Digital pattern reading type converter

Magnetic, inductive or capacitive

364561, H03M 122

Patent

active

049874144

ABSTRACT:
In construction of a signal processing circuit for an encoder including a pair of phased magnetic sensors arranged, for relative displacement, facing a magnetized track on a scale, output signals issued by the magnetic sensors are first stage divided by an analog processing unit and, after conversion into digital signals, second stage conversion is carried out by a digital phase locked loop connected to the analog processing unit. The degree of dissolution in detection of the displacement by the entire circuit is remarkably enhanced by the dual stage division of the signals during processing.

REFERENCES:
patent: 4445112 (1984-04-01), Haville
patent: 4811254 (1989-03-01), Iijima et al.

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