Patent ID: 9124324
Filing Date: 2015-09-01
Classification: H03F,H04B,H04L

Abstract:
1. A transmitter circuit comprising: a digital input lead coupled to a digital input signal; modulation circuitry having an input connected to the digital input lead and having a modulation output; crest factor reduction circuitry having an input connected to the modulation output and having an crest factor reduction output; digital predistortion circuitry having an input lead connected to the crest factor reduction output, the digital predistortion circuitry including: digital to analog converter circuitry having an input connected to the second predistorted digital output and having an analog output; RF up converter circuitry having an input connected to the analog output and having a radio frequency output; power amplifier circuitry having a radio frequency input connected to the radio frequency output and having a transmitter output; attenuation circuitry having a transmitter input connected to the transmitter output and having an attenuated output; RF down converter circuitry having an attenuated input connected to the attenuated output and having an analog feedback signal output; post process circuitry having an analog feedback signal input connected to the analog feedback signal output and having a corrected feedback signal output connected with the first error input and with the second error input.