| 摘要 |
PURPOSE:To suppress the generation of heat for a resistance by oscillating the input side current via an oscillation part and securing the intermittent flow of this current for a voltage input circuit which inputs the pulse signals as the ON and OFF signals of a power voltage level. CONSTITUTION:An oscillation part A2 consists of a primary terminal of an AC photocoupler P connected in series to a capacitor C1, a resistance R2, and a trigger diode D1. The current flowing to the input side of the photocoupler P is oscillated by the charging/discharging operations of the diode D1 and the capacitor C1 when said current exceeds the threshold voltage level of the D1 in an ON state of an input signal. Thus the current flows intermittently. As a result, the generation of heat can be reduced for resistances R1, R2, R3, etc. |
