| 摘要 |
The invention relates to a circuit arrangement for an integrated output amplifier (1) with two constant current sources (2, 3), a voltage amplifier with two inputs (5, 6) and two outputs (7, 8) and two output transistors (Q1, Q2) coupled thereto and two feedback networks (9, 10) producing negative feedback between the output transistors and the input transistors of the voltage amplifier (4) allocated thereto. The first two feedback networks (9, 10) are connected between the collectors of the output transistors (Q1, Q2) and the base electrodes of the appropriate input transistors of the voltage amplifier (4). In addition there is a third feedback network (11) coupled on the input side to the base electrode of the output transistors and on the output side, via a transistor (Q3) acting as a current sink, to the input of a current distribution network (16) having a signal input (17). The current distribution network (16) has two parallel branches (18, 19) between which the current flowing through this network, controlled by the signal at the signal input (17) can be split, the branches (18 or 19) of the current distribution network (16) being connected on the one hand to the constant current sources (2 or 3) and on the other to the inputs of the voltage amplifier (4). |
