Patent ID: 7501859
Filing Date: 2009-03-10
Classification: H03K,H04L

Abstract:
1. An apparatus including a differential signal transmitter capable of providing a status signal indicative of a predetermined change in a differential signal current, comprising: first and second signal electrodes to convey a differential signal current with at least lower and higher magnitudes; current source and sense circuitry to provide a supply current with at least lower and higher magnitudes, sense said lower and higher supply current magnitudes, and provide a status signal indicative of said lower and higher supply current magnitudes; and differential signal transmission circuitry coupled to said current source and sense circuitry and said first and second signal electrodes to receive a first data signal and in response thereto draw said supply current and provide said differential signal current, wherein said lower and higher supply current magnitudes correspond to said lower and higher differential signal current magnitudes.