Coded data generation or conversion – Digital pattern reading type converter – With directional discrimination
Reexamination Certificate
2008-05-06
2008-05-06
Mai, Lam T. (Department: 2819)
Coded data generation or conversion
Digital pattern reading type converter
With directional discrimination
C341S001000
Reexamination Certificate
active
11512835
ABSTRACT:
An encoder signal processing circuit includes: a plurality of detectors adapted to generate signals with different phases; a switching circuit adapted to alternatively select and output a signal from the detectors; and a waveform shaping circuit adapted to shape waveforms of output signals from the detectors that are switched by the switching circuit. The encoder signal processing circuit may include a direction determining/counting unit adapted to: (a) monitor output signals from the waveform shaping circuit in relation to an operation of the switching circuit, (b) determine a direction of movement and an amount of movement; and (c) calculate the amount of movement.
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Dr. Johannes Heidenhain GmbH
Kenyon & Kenyon LLP
Mai Lam T.
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