Electricity: motive power systems – Open-loop stepping motor control systems
Reexamination Certificate
2005-06-07
2005-06-07
Masih, Karen (Department: 2837)
Electricity: motive power systems
Open-loop stepping motor control systems
C318S685000, C318S560000
Reexamination Certificate
active
06903531
ABSTRACT:
A driver circuit is provided for a stepper motor which utilizes a processor that outputs a PWM signal. The driver circuit includes an H-bridge circuit having first and second inputs, and a switching circuit having an input and an output. The first H-bridge input and the switching input connect to the PWM signal output from the processor, and the switching output connects to the second H-bridge input. The switching circuit performs an inversion of a duty cycle of the PWM signal when the PWM signal is present, and a non-inversion of the duty cycle when the PWM signal is not present.
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Stankey Thomas M.
Suomi Eric W.
Electronic Theatre Controls, Inc.
Greer Burns & Crain Ltd.
Kolehmainen Philip M.
Masih Karen
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