Patent ID: 7672380

Claim:
A system comprising: a. a common-mode signal encoder having first and second encoder output nodes conveying respective first and second common-mode signal components; b. a first signal line coupled to the first encoder output node and conducting the first common-mode signal component; c. a second signal line coupled to the second encoder output node and conducting the second common-mode signal component; d. a common-mode signal decoder having: i. an extraction circuit having an extraction-circuit input node coupled to the first signal line and receiving the first common-mode signal component and an extraction-circuit output node providing a common-mode signal extracted from at least one of the first and second common-mode signal components; ii. a filter having a filter input node, coupled to the extraction-circuit output node, and a filter output node; and iii. a comparison circuit having a first sampler input terminal, coupled to the extraction-circuit output node, and a second sampler input terminal coupled to the filter output node, to recover data.