Patent ID: 8521105

Claim:
A transmitter for transferring a transmission signal through a transmission medium, the transmitter comprising: a gain stage configured to receive an input signal and generate a first signal according to the input signal, wherein the gain stage comprises: a transconductance cell, configured to convert the input signal into a transconductance signal according to a transconductance of the transconductance cell; and an impedance unit, coupled to the transconductance cell, configured to receive the transconductance signal to output the first signal; and an output stage, coupled to the gain stage, configured to receive the first signal and output the transmission signal according to the first signal, wherein the output stage operates according to a first working voltage and the gain stage operates according to a second working voltage, wherein the first working voltage powers components in the output stage and the second working voltage powers components in the gain stage, and wherein the first working voltage is a lower value than the second working voltage; wherein a voltage level of the first working voltage is less than twice of the maximum of the transmission signal.