Patent ID: 6559721
Filing Date: 2003-05-06
Classification: H03F

Abstract:
A circuit configuration, comprising:an integrated amplifier with a symmetrical amplifier output; a supply potential terminal to be coupled to a voltage source for supplying an operating current; a reference potential terminal to be coupled to the voltage source; a tri-state output; and an output stage having a pair of complementary output transistors with control inputs connected to said symmetrical amplifier output, said pair of complementary output transistors includes a first output transistor having a controlled path coupling said supply potential terminal to said tri-state output, and a second output transistor having a controlled path coupling said tri-state output to said reference potential terminal, said output stage further having switches coupling said first and second output transistors with said tri-state output so that said tri-state output is put into a high-impedance state given an interruption of the operating current.