| 摘要 |
1,250,275. Voltage regulation. ITT INDUSTRIES Inc. Feb. 19, 1969 [Feb.24, 1968], No. 8947/69. Heading G3X. An unstabilized direct supply voltage Vo is stabilized to a voltage Va which is equal to the sum of the base-emitter voltages of transistors T1, T2, the base-current of transistor T2 being equal to the emitter current of the transistor T1 under direct-current conditions. When an A. C. signal appears at point Va, the base-emitter path of the transistor T2 is shunted by a capacitor C whereby the internal resistance of the circuit increases with the frequency. The transistors T1, T2, may be connected respectively to further transistors to form Darlington amplifiers, a Zener diode being inserted between the emitter of transistor T1 and the base of transistor T2, Fig. 2 (not shown). A transistor forming part of an amplifier stage to be stabilized has its collector connected to the terminal Va and the resistor R, Fig.3 (not shown). The circuit arrangement may be applied to monolithic integrated amplifying circuits. |
