Patent ID: 9634625
Date: 2017-04-25
CPC Classifications: G11C,H03F

Claim:
1. A radio frequency (RF) transmitter, comprising: a digital signal processing circuit, arranged for generating a digital amplitude control word signal and a power control signal, wherein the power control signal is a digital command; a bias control circuit, coupled to the digital signal processing circuit, the bias control circuit arranged for receiving the power control signal, adjusting at least one bias voltage according to the power control signal, and outputting the at least one adjusted bias voltage; a digital power amplifier (DPA), coupled to the digital signal processing circuit and the bias control circuit, the DPA arranged for receiving at least an RF input signal, the digital amplitude control word signal and the at least one adjusted bias voltage to generate an RF output signal; and a loopback circuit, coupled to the digital signal processing circuit and the DPA, the loopback circuit arranged for receiving the RF output signal to generate a loopback signal, wherein the digital signal processing circuit generates the power control signal according to the loopback signal.