| 摘要 |
PURPOSE:To prevent the generation of a large ripple even when the response frequency of a current detector is increased by mounting two sample holding circuits and each holding ripple signals on the positive side and the negative side. CONSTITUTION:A first sample holding circuit 13 holds a detecting signal generated from a current detector 6 when the pulses of a first pulse generator 11 are generated, thus holding a ripple signal on the positive side. A second sample holding circuit 14 holds a detecting signal generated from the current detector 6 at a time when the pulses of a second pulse generator 12 are generated, thus holding a ripple signal on the negative side. An adder 15 adds the signals held by the first sample holding circuit 13 and the second sample holding circuit 14, cancels the ripple signals on the positive side and the negative side, and feeds back the signals. |
