Patent ID: 8027377
Filing Date: 2011-09-27
Classification: H03F,H04L

Abstract:
1. A transceiver circuit having a transmission mode and a receiving mode, comprising: a receiver circuit for receiving an input differential signal during the receiving mode; a transmitter driver circuit wherein, in the transmission mode, the transmitter driver circuit drives an output differential signal, and wherein, in the receiving mode, the transmitter driver circuit provides a termination circuit for the input differential signal and provides for tracking a current that is provided in the transmission mode; and a variable resistive circuit connecting between a supply voltage and the transmitter driver circuit wherein, in the transmission mode, the variable resistive circuit provides a first resistance and wherein, in the receiving mode, the variable resistive circuit provides a second resistance, such that a common-mode voltage of the output differential signal substantially equals a common-mode voltage in the input differential signal at the termination circuit.