Importance

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Abstract

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 with these, as well as two feedback networks (9, 10) producing negative feedback which are connected between the output transistors and the corresponding input transistors of the voltage amplifier (4). The first two feedback networks (9, 10) are connected between the collectors of the output transistors (Q1, Q2) and the base electrodes of the corresponding input transistors of the voltage amplifier (4). In addition, a third feedback network (11) is connected on the input side to the base electrodes of the output transistors and on the output side to the input of a current splitting network (16) via a transistor (Q3) acting as a current sink, whereby said current splitting network has a signal input (17). The current splitting network (16) has two parallel branches (18, 19), between which the current flowing through this network can be split, whereby this is controlled by the signal present at the signal input (17), and whereby the branches (18 and 19) of the current splitting network (16) are connected on the one hand with the constant current sources (2 and 3) and on the other hand with the inputs of the voltage amplifier (4).

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First Claim