| 摘要 |
A driver circuit for a transistor bridge is selectively controllable to produce four state operation of a DC motor. The driver circuit has two control inputs yielding four distinct input combinations, each combination producing a different state of motor operation. The states which may be selectively produced are (1) motor off or coasting, (2) motor on, counterclockwise rotation, (3) motor on, counterclockwise rotation and (4) motor off, dynamic braking.
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