Data transmitter

摘要

A data transmitter may include a transmitter circuit and a calibration controller. The transmitter circuit is configured to be coupled to a receiver through a channel, and configured to provide an output signal to the channel based on an input signal and adjust an output impedance value according to a bias signal. The calibration controller is configured to adjust the bias signal by comparing the output signal of the transmitter circuit to a reference signal during a calibration operation.

主权项

1. A data transmitter comprising:
a transmitter circuit configured to be coupled to a receiver through a channel, the transmitter circuit configured to provide to the channel an output signal based on an input signal, and adjust an output impedance value according to a bias signal; and a calibration controller configured to adjust the bias signal by comparing the output signal of the transmitter circuit to a reference signal during a calibration operation, wherein the transmitter circuit is configured to keep the output impedance value substantially unchanged after the calibration operation is performed, and the transmitter circuit comprises a plurality of switching elements coupled in parallel to each other and a switching circuit, and wherein the plurality of switching elements are configured to adjust a magnitude of the output signal according to the bias signal and the switching circuit is configured to adjust the output signal according to the input signal.