Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1992-02-12
1993-06-01
Ip, Paul
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318606, 318696, 318602, G01D 526
Patent
active
052163466
ABSTRACT:
A waveform processing circuit for a pulse generator provided between the pulse generator and a motor control circuit, comprises a frequency dividing circuit and a control signal generation circuit. The frequency dividing circuit outputs, on the basis of an A-phase pulse signal and a B-phase pulse signal outputted from the pulse generator, a pulse signal having a duty ratio of 1:1 and being inverted in response to rise of the A-phase pulse signal and a pulse signal having a duty ratio of 1:1 and being inverted in response to fall of the A-phase pulse. The control signal generation circuit generates, on the basis of these two pulse signals, a traveling amount signal and a direction discrimination signal. Thus, the motor control circuit carries out, on the basis of the traveling amount signal and the direction discrimination signal, motor control without undergoing the influence of a duty ratio of the pulse generated from the pulse generator.
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patent: 3781615 (1973-12-01), Mokrytzki et al.
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patent: 4482850 (1984-11-01), Sonoda et al.
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patent: 4591969 (1986-05-01), Bloom et al.
patent: 5006772 (1991-04-01), Danby
Brother Kogyo Kabushiki Kaisha
Ip Paul
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