| 摘要 |
PROBLEM TO BE SOLVED: To reduce current consumption by using a connecting point between the emitter and collector of transistors(TRs) A, B as an output, providing a prescribed voltage drop circuit between the collector and a base and applying a signal to the base of the TRA so as to operate the switching circuit at a high speed. SOLUTION: A collector of a TR Q2 connects to a power supply Vcc via a resistor R1, its emitter is connected to a collector of a TR Q3, and to a base of a TR Q1 an each emitter of the TRs Q3, Q1 is connected to ground. Furthermore, the collector of the TR Q1 is used for an output Vout and connects to a power supply Vc via a resistor RL, a base of the TR Q2 is used for an input terminal IN, to which a signal to inputted. A constant voltage drop circuit (D1, D2) whose voltage drop is higher than a collector-emitter voltage of the TR Q2 and a capacitor Csp are provided between the collector of the TR Q2 and the base of the TR Q3. Thus, the switching circuit is operated at a high speed by one input signal and the current consumption is reduced. |
