| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit equipment for controlling a DC motor in which more accurate speed control and driving in two directions are possible. SOLUTION: Regarding a circuit equipment for controlling a DC motor 6 capable of being driven in two directions, the circuit equipment is equipped with a control means 8 having a reference potential input terminal 8a and a control input terminal 8b with which speed of the motor 6 can be controlled. In order to achieve more accurate speed control for this kind of a circuit equipment, switching means 1, 2, 3, 4 are installed and act as follows; the circuit equipment can operate the control means 8 for speed control of the DC motor 6 in response to rotation of the motor 6 in a first direction, and the control means 8 can be locked to the rotation of the second direction of the motor. The circuit equipment is suitable for use in a deck of a magnetic tape cassette equipment. |
