Patent ID: 7440494

Claim:
A device configured to provide simultaneous bi-directional data transfer, the device comprising: a transceiver including: a transmitter to transmit an output signal to a data line, a first receiver having first and second input nodes, the first input node of the first receiver being configured to receive a first fixed reference voltage and the second input node of the first receiver being configured to receive a combined signal from the data line, the combined signal being a signal resulting from combining the output signal of the transmitter and an input signal from a remote device, a second receiver having first and second input nodes, the first input node of the second receiver being configured to receive a second fixed reference voltage and the second input node of the second receiver being configured to receive the combined signal from the data line, and a selector including an output node and first, select, and second input nodes, the first input node of the selector being configured to receive a signal output by the first receiver, the select input node of the selector being configured to receive the output signal as a select signal via a delay adjusting circuit, the second input node of the selector being configured to receive a signal output by the second receiver, the output node of the selector being configured to output the input signal received from the remote device that has been reproduced by the selector, wherein the selector selects the input signal received from the remote device by the select signal and outputs the input signal received from the remote device to the output node of the selector.