Patent ID: 6911866
Filing Date: 2005-06-28
Classification: H03F

Abstract:
1. A method for amplification of analog push-pull signals by means of a push-pull amplifier output stage having a first output stage transistor and a second output stage transistor, comprising the steps of: a) applying a first analog push-pull signal to the first output stage transistor and to a first control transistor by means of which a first control current is controlled; b) applying a second analog push-pull signal to the second output stage transistor and to a second control transistor by means of which a second control current is controlled; c) comparing the first control current with a first reference current produced by a first reference current device; d) comparing the second control current with a second reference current produced by a second reference current device; e) outputting a fault signal as a function of the comparison, only when the first reference current is exceeded by the first control current and the second reference current is exceeded by the second control current; f) feeding back the fault signal such that an inrush current is limited by limiting at least one control voltage of at least one output stage transistor; and g) outputting of the amplified analog push-pull signal as output currents via an output connection.