Output stage for signals symmetrical about the neutral line

摘要

The invention relates to an amplifier circuit which is specifically suitable for electromedical purposes. The aim is to improve the technical parameters of the transmission behaviour of the entire output stage. There is the object of providing a circuit arrangement by which signals of a generator which are symmetrical about the neutral line can be amplified, it being intended for the output to be of constant current and resistant to short-circuits. The object is achieved by using a rectifier circuit to separate the signals into positive and negative components, which pass to an optocoupler. In a push-pull transistor circuit with respectively separate power sources and a common load resistor, a separate amplification of the components and composition takes place in the load resistor. Resistance to short-circuits is achieved by incorporating series resistors. The field of applications is that of amplifier technology, preferably for use as an output-stage amplifier for devices producing stimulating currents. <IMAGE>