Patent ID: 7570714
Filing Date: 2009-08-04
Classification: H03K,H04B,H04L

Abstract:
1. A data transfer apparatus comprising: a transmitter including: an output buffer developing a differential signal in response to a data signal; and an amplitude controller; a receiver including: an input buffer receiving said differential signal through a transmission line and converting said differential signal into a single-end signal; and an amplitude detector developing a feedback signal in response to said single-end signal, wherein said amplitude controller controls an amplitude of said differential signal in response to said feedback signal, wherein said transmission line comprises first and second signal lines connected between said input and output buffers, wherein said output buffer includes: first and second variable voltage sources developing first and second voltages, respectively, and switch circuitry responsive to said data signal for outputting one of said first and second voltages to said first signal line, and the other one of said first and second voltages to said second signal line, and wherein said amplitude controller controls said first variable voltage source to change said first voltage in response to said feedback signal.