Signaling with Superimposed Differential-Mode and Common-Mode Signals

摘要

A data receiver circuit (206) includes first and second interfaces (221) coupled to first and second respective transmission lines (204). The first and second respective transmission lines comprise a pair of transmission lines external to the data receiver circuit. The first and second interfaces receive a transmission signal from the pair of transmission lines. A common mode extraction circuit (228) is coupled to the first and second interfaces to extract a common-mode clock signal from the received transmission signal. A differential mode circuit (238) is coupled to the first and second interfaces to extract a differential-mode data signal from the received transmission signal. The extracted data signal has a symbol rate corresponding to a frequency of the extracted clock signal (e.g.,—the symbol rate may be twice the frequency of the extracted clock signal). The differential mode circuit is synchronized to the extracted clock signal.