| 摘要 |
An amplifier is provided comprising an input transistor and an output transistor connected in series between two power supply terminals. The biassing of the base of the output transistor is determined by an impedance bridge coupling one of the supply terminals to the output of the amplifier. A "parallel resistor-capacitor" cell, coupled between the output transistor and the output of the amplifier, plays the role, with the base-emitter diode of the output transistor, of a detector circuit. This arrangement, by increasing the voltage at the terminals of the resistor of the cell depending on the detected signal, increases correlatively the current supplying the transistors as a function of the amplitude of the signals to be amplified. |
