Coded data generation or conversion – Digital pattern reading type converter – Incremental
Patent
1987-08-05
1989-01-03
Shoop, Jr., William M.
Coded data generation or conversion
Digital pattern reading type converter
Incremental
318603, H03M 122
Patent
active
047960051
ABSTRACT:
A circuit for an encoder apparatus of an incremental-type construction, including: a unit mechanically joined to a movable machine; a unit for outputting at least two signals having a phase shift and a periodic waveform in response to movement of the unit; a battery-type power supply; and an electric ciruit including a circuit for generating a timing pulse having predetermined frequency and pulse width, a circuit for detecting a change of the signals from the signal outputting circuit and for outputting a pulse signal in response to the change of signals, and a circuit for counting the pulse signal from the signal-change detecting circuit. The apparatus may be optical or magnetic in construction.
REFERENCES:
patent: 2926335 (1960-02-01), Bower
patent: 3914760 (1975-10-01), Logue
patent: 3944813 (1976-03-01), Fowler
patent: 4117320 (1978-09-01), Tomlinson et al.
patent: 4156467 (1929-05-01), Patton et al.
patent: 4319134 (1982-03-01), Weber
Electrical Design News, vol. 27, No. 20, Oct. 1982, page 187, Boston, MA, US: D. M. Pfister: "2-IC Circuit Decodes Quadrature Waveforms".
Ishida Hiroshi
Taniguchi Mitsuyuki
Blum Richard K.
Fanuc Ltd.
Shoop Jr. William M.
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