| 摘要 |
PURPOSE:To make it possible to carry out the DC drive with a high control gain by connecting a sample hold circuit to the outputs of control type constant current circuit and waveform shaping circuit. CONSTITUTION:The output signal of a frequency generator 1 is given to a waveform shaping circuit 3 and a one-shot pulse generation circuit 4. In accordance with the output pulse of the one-shot pulse generation circuit 4, a control type constant current circuit 5 gives the charging or discharging current to the waveform shaping circuit composed of a condenser CF2 and a resistance RF. A sampling hold circuit 7 holds in sampling the output of the waveform shaping circuit with a sampling pulse b and supplies current to a motor 2 through a buffer circuit 6. Thus, the AC transfer function of high stability is obtained and the DC drive can be performed with a high control gain. |
