| 摘要 |
PURPOSE:To eliminate the overshoot or undershoot caused for a bipolar coding signal, by providing a closed loop absorbing a counter electromotive force generated in the primary winding of a transformer. CONSTITUTION:A control circuit 22 turns on transistors (TRs) 13, 14 and a pulse is outputted from a secondary winding 4b of a transformer 4. The circuit 22 turns off the TR13 and turns on TRs 12, 14 for a short time. Thus, a closed loop of terminal T6 TR14 diode 21 intermediate tap T7 is formed to absorb the counter electromotive force produced in the primary winding 4a of the transformer 4. Similarly, the circuit 22 turns on the TRs 13 and 12 and a pulse is outputted from the winding 4b. The circuit 22 turns off the TR13 and turns on the TRs 12, 14 for a short time. Thus, a closed loop of terminal T5 TR12 diode 21 intermediate tap T7 is formed to absorb the counter electromotive force produced in the primary winding. |
