| 摘要 |
PURPOSE:To reduce the change of the current flowed to a load circuit by switching to make the switching speed high by using one common load for plural analog switch circuits to reduce the number of circuit elements of the load. CONSTITUTION:A circuit consisting of a resistance R1 and a diode D1 is used instead of a load circuit of a pnp transistor (TR) as a load of a differential circuit. The diode D1 is connected to compensate the potential between the base and the emitter of an output TR T7. Since the high-response speed and stable resistance load R1 is used, the responsiveness for current switching is very good. Further, since the diode D1 is connected commonly to ei1 and ei2 side circuits, the collector current of a TR T3 or T3' is always flowed. Therefore, the speed is made high because the internal impedance of the diode can be always made low. Since the output impedance is lowered by the TR T7, the circuit is not affected by the variance of a load connected to a terminal e0. |
