Electricity: motive power systems – Open-loop stepping motor control systems
Reexamination Certificate
2007-03-20
2007-03-20
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Open-loop stepping motor control systems
C318S685000, C318S254100
Reexamination Certificate
active
10448491
ABSTRACT:
The present invention relates to an apparatus for driving a stepping motor, including a plurality of push-pull circuits each of which is capable of controlling a push state in which a current is supplied to a terminal and a pull state in which a current is drawn through the terminal and which are connected to coils to operate the stepping motor utilizing the bipolar driving. In the apparatus of the present invention, at least one of the push-pull circuits is connected to a common terminal having one ends of the coils of different phases connected thereto, thereby reducing the number of circuits and driving lines.
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Cowan Liebowitz & Latman P.C.
Donovan Lincoln
McCloud Renata
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