| 摘要 |
PURPOSE:To decrease the temperature dependancy by using two transistors (TRs) whose collectors are connected to a common connecting point between a reference voltage generating terminal and a constant current source via a resistor. CONSTITUTION:An emitter of a TRQ7 acting like a constant current source is connected to a reference voltage terminal Vref, and collectors of the TRs Q3, Q4 are connected to the common connecting point via the resistors R1, R2 respectively. Bases of both the TRs are connected across a resistor R4, a base VB1 of the TRQ3 is connected to the reference voltage terminal Vref via a resistor R3 and a base VB2 of the TRQ4 is connected to common via a resistor R5 and a TRQ5. Since both the base voltages VB1, VB2 depend on a reciprocal of the voltage gain of the TRs Q3, Q4, even when collector voltages VC1, VC2 are fluctuated, the effect is very less. |
