| 摘要 |
PURPOSE:To supress the variation of the reflection factor caused by the fluctuation of the power supply voltage, by connecting the transistor having the bases connected in common among the collector of each transistor forming the current Miller circuit, the current source and the external circuit each. CONSTITUTION:The emitter-collector circuit of the transistor TR7 is connected between the collector of the TR1 and the A-side contact of the switch 4, and at the same time the emitter-collector circuit of the TR8 is connected between the collector of the TR2 and the external circuit 6. Furthermore, a common connection is secured between the bases of the TRs 1 and 2 as well as the TRs 7 and 8 respectively. And the collector of the TR2 and the collector of the TR7 are connected to the bases of the TR1 and TR8 each. As a result, the collector-emitter voltage is fixed for both the TRs 1 and 2, thus producing no change to the collector current of both the TR1 and 2. As a result, no effect of the power supply voltage is given to the saturation electricity of both the TRs 1 and 2. Accordingly, the variation can be suppressed to the fluctuation of the power supply voltage having the reflection factor m=I2/I1 of the current Miller. |
