Patent ID: 6225832
Filing Date: 2001-05-01
Classification: H04L

Abstract:
A signal regeneration circuit for recovering a digital signal from an input signal supplied via metallic isolation, comprising:two input terminals receiving an input signal;one output terminal outputting a recovered digital signal; anda current direction sensor connected to said two input terminals for detecting a current direction prevailing between said two input terminals and for outputting a signal representing the prevailing current direction, said current direction sensor including a voltage clamping configuration for fixing a voltage between said two input terminals, said current direction sensor including a first input transistor and a second input transistor connected to said two input terminals, said first input transistor being of a first conductivity type and said second input transistor being of a second conductivity type opposite said first conductivity type;said current direction sensor including a current mirror having a first current mirror circuit, a second current mirror circuit, a third current mirror circuit, and a fourth current mirror circuit, the first current mirror circuit reflecting a current flow through said voltage clamping configuration in a first current flow direction and said second current mirror circuit reflecting a current flow through said voltage clamping configuration in a second current flow direction, said third current mirror circuit connected to an output current oath of said first current mirror circuit and said fourth current mirror circuit connected to an output current path of said second current mirror circuit, said current mirror forming an output driver configuration outputting the signal representing the prevailing current direction.