Patent ID: 7116140
Filing Date: 2006-10-03
Classification: G06F,H03K

Abstract:
1. A circuit arrangement for recognizing an electrical input signal and outputting an output signal in response to and dependent on said input signal, said circuit arrangement comprising: a reference terminal at which a reference potential is to be applied; an input terminal at which said input signal is to be applied, wherein said input signal is defined relative to said reference potential; an output terminal at which said output signal is to be output; a recognition circuit that is connected between said input terminal and said reference terminal, and that includes an amplifier arrangement adapted to generate an amplified signal in accordance with said input signal, and a first switch device which is controllable by said input signal so as to provide said amplified signal in a controlled manner at an amplified signal output of said recognition circuit; an evaluation circuit that is connected between said amplified signal output and said output terminal, and that includes a switch arrangement connected to said amplified signal output and controllable by said amplified signal, and that is adapted to produce and output said output signal at said output terminal; and a power terminal at which a supply voltage is to be applied; wherein said switch arrangement of said evaluation circuit comprises a current mirror circuit connected between said power terminal and said output terminal and between said power terminal and said amplified signal output of said recognition circuit.