| 摘要 |
PURPOSE:To enable the adjustment of an output voltage of both polarities only with one adjustment, by obtaining the reference voltage of the both polarities through the constant current operation of a transistor (TR), etc. by the output of a constant voltage generating element. CONSTITUTION:TRs Q1 and Q2 are output transistors inserted in series in the power supply line. To detect the variance of the output voltage, voltage division circuit (resistors R1, R2, R3, R4) and differential amplifiers (TRs Q3, Q4, Q5, Q6) are provided. The reference voltage of the differential amplifiers is obtained from a constant current i1 from a constant voltage diode D1 and a TRQ7 and a resistor R10. Further, a current Miller circuit is provided, a constant current i3 with opposite polarity to the constant current i1 is obtained, and the reference output with opposite polarity can be obtained from both the ends of a resistor R13. |
