| 摘要 |
PURPOSE:To reduce the power consumption by providing a couple of NPN transistors(TR), a couple of NPN TRs, and a diode. CONSTITUTION:When the power source is turned on, a couple of NPN TRs Q3 and Q4 are applied with the source voltage through the diode D to turn on and then a couple of PNP TRs Q1 and Q2 and a couple of NPN TRs Q3 and Q4 turn on to cut off a forward current flowing through the diode D automatically. Then the ON state is maintained with the collector currents of the NPN TRs Q3 and Q4, NPN TRs Q5 and Q6, and PNP TRs Q1 and Q2. Consequently, the power source of the actuating circuit is reducible.
|
