Patent ID: 8620233
Filing Date: 2013-12-31
Classification: H03F,H04L

Abstract:
1. A circuit for amplifying signals, comprising: a predistortion circuit distorting an input signal in dependence upon a predistortion correction value selected from a plurality of predistortion correction values stored in a look-up table (LUT), and adjusting the distorted signal in dependence upon a variation of circuit characteristics; a transceiver circuit coupled to receive the output signal from the predistortion circuit and processing the received signal in dependence upon a certain transceiver transfer function; an amplification circuit coupled to receive the output signal from the transceiver circuit and amplifying the signal in dependence upon an amplification transfer function; a compression detector circuit coupled to receive the amplified signal output from the amplification circuit and a signal from an input signal of the amplification circuit, detecting whether the amplification circuit is operating in a compression mode, and generating a compression indication signal; and a compare and adapt circuit coupled to receive the compression indication signal, controlling the predistortion circuit for controlling the adjustment of the distorted signal in dependence upon the received compression indication signal.