| 摘要 |
PURPOSE:To improve the efficiency of an amplifier for switching a DC motor by improving the rise and fall of the output pulse by adding a condenser to the input of an emitter-grounded amplifier of a drive circuit. CONSTITUTION:A transistor 25 is connected through a resistor 27 to the first power source 23 to control the output circuit having an output power transistor 28 connected to the second power source 30 and a load 29 by a drive circuit formed of an input terminal at the base and an emitter-grounded amplifier, a transistor 21 applied with a chopper waveform input pulse from the terminal 22 is connected to the base of the transistor 25, a condenser 31 is connected to form a DC motor servo amplifier. Accordingly, positive feedback is performed by the condenser 31 to accelerate the rise and fall of the output pulse of the transistor 28, thereby improving the efficiency. |
