| 摘要 |
PURPOSE:To accomplish a circuit of stable operation and economy, by connecting a pulse width variable circuit of drive pulse to a drive circuit of a relay and connecting a diode in parallel with the coil of the relay. CONSTITUTION:An output of a contact (a) for drive pulse reception is inputted to a differentiation circuit provided in a pulse width variable circuit 2, and the differentiated waveform of the output delay an operation start time of a pulse relaying relay AA by a drive pulse. Further, the delay in a restoration start time of the pulse relaying relay AA is made with an integration circuit provided in the pulse width variable circuit 2. The circuit 2 incorporates a differentiation circuit and an integration circuit to vary the pulse width. Further, a diode D is connected in parallel with the coil of the relay AA. Thus, when the coil of the relay AA restores, a reverse voltage appeared across the coil is absorbed and noise is suppressed, and a correction circuit with stable operation and not requiring special components can be accomplished with the varying of the said pulse width. |
