| 摘要 |
<p>PURPOSE:To attain the conduction/interruption of a power supply current while an operating section is connected to a power line as it is by turning on/off a switching element with an external signal to generate a control voltage and using the control voltage to conduct/interrupt the power current driving the operating section. CONSTITUTION:A gate voltage generating circuit 3 is constituted of a switching enhancement type FET 33, its drain 33d is connected to a power terminal 31, a source 33s is connected to the anode of a diode D1 and a gate 33g is connected to an external voltage application terminal 34. A control voltage is generated by turning on/off the switching element 33 with an external signal and the control voltage is used to conduct/interrupt the power current driving the operating section. Thus, the power current supplied from a power line is conducted/ interrupted while the operating section is connected to the power line as it is to reduce the current consumption without generating noise.</p> |
