Low comment mode impedence differential driver and applications thereof

摘要

A low common mode impedance differential driver includes an independent current source, a switching module, a dependent current source, and a bias control circuit. The independent and dependent current sources are operably coupled to the switching module to provide first and second current paths through the switching module. The bias control circuit is operably coupled to the dependent current source and to the differential output produced by the switching module. The bias control circuit provides a control signal to the dependent current source that causes the common mode of the differential output to be maintained within a desired tolerance.