Amplifier arrangement.

摘要

A high efficiency amplifier of the class-G type comprises a first transistor (T1) whose collector is connec-connected to a first supply voltage (V1) via a first diode (D1), and a second transistor (T2) which is connected in series with said firstdiode (D2 and D3), and a second carrent source (8). The junction point (3) between the first transistor and the second transistor (T1, T2) is connected to the anode (9) of the second diode (D2) by mesas of a third diode (D4) and the emitter of the third transistor (T3) is connected to the second current source (8) by means of a fifth diode (D5) By means of such a driver circuit the output (2) can be driven to a voltage which is equal to the second supply voltage (V2) minus substantially one base-emitter voltage.