| 摘要 |
PURPOSE:To decrease the power consumption of an output resistor to a negligible extent and to improve high-frequency characteristics, by flowing only a current compensating the leakage of a capacitive load to an output resistor connected to a collector of a PNP transistor (TR) and an NPN TR. CONSTITUTION:An emitter of the PNP TRTR1 and the NPN TRTR2 is connected to an input signal terminal SIN via capacitors C1, C2, respectively. The collector of the TRTR1, TRTR2 is both connected to the capacitive load CL and the other end of the capacitive load CL is grounded. Further, the collector of the TRTR1 is connected to a power supply P120 via a resistor R1, the emitter is via a diode D1 and the base is via a resistor R3, respectively. Further, the base of the TRTR1 is grounded with a parallel circuit comprising a resistor R4 and a capacitor C2. Moreover, the capacitor C2 connected to the emitter of the TRTR2 is connected to a resistor R2 in parallel and the emitter is grounded via a parallel circuit comprising a capacitor C4 and a Zener diode ZD1, and the load CL is driven at high speed at a low power. |
