| 摘要 |
A circuit for extracting a common mode data signal applied to a plurality of component signals. The circuit including a current driver, resistance, and a common mode extraction unit connected in series. The extraction unit has an impedance substantially proportional to the average voltage of the applied input signals and may be formed of a series of matched transistors connected in parallel. In a single-path configuration, when pairs of differential signals are applied, the voltage drop across the extraction unit is proportional to the overall common mode signal level carried by the differential signal components. In a multiple path configuration, two or more extraction units may be connected to a common current driver and configured in a differential amplifier configuration.
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