Patent ID: 7123729
Filing Date: 2006-10-17
Classification: H01L,H03G,H03K

Abstract:
1. A signal processing system comprising: means for providing a de-emphasis function to a first signal at a pin of an integrated circuit, the first signal being intrinsic to the integrated circuit, and means for coupling a second signal extrinsic of the integrated circuit to said pin of the integrated circuit so that a means within the integrated circuit for providing an attenuation function operates on the second signal, wherein when impedance present at said pin is at a first value, the first signal is switched “off” and the second signal is switched to a signal coupling mode at said pin, and when the impedance present at said pin is at a second value higher than the first value, the first signal is switched “on” and the second signal is switched to a non-signal coupling mode, at said pin.