| 摘要 |
PURPOSE:To decrease the effect of load on the voltage fluctuation, by arranging a controlling transistor (TR) between emitters of a couple of TRs constituting a current mirror circuit and a power supply and controlling the controlling TR based on a voltage of an output terminal of the mirror circuit. CONSTITUTION:A base of the 3rd TRQ3 is connected to the output terminal of the current mirror circuit and its emitter potential is determined by the voltage at the output terminal. A resistor BA and diode groups D1-Dn are connected between the emitter of the TRQ3 and the power supply, a voltage between the emitter and the power supply is divided and applied to the base of the 4th TRQ4. The TRQ4 decides a current flowing to the current mirror circuit with this base voltage. As a result, even if a potential V1 of an output terminal P2 is fluctuated, the fluctuation in the emitter-collector voltage of the TRQ2 is suppressed. |
