Abstract: The present invention relates to the control of power amplifiers in order to enhance the efficiency of the amplifier by tracking the envelope of input signal and applying the same envelope into the drain voltage of a last stage power transistor. This invention can be used in each and every wireless communication transmitter, since there is definitely a power amplifier in the last part of the transmitter before the antenna, and every power amplifier has limited power performance, depending on type of modulation, due to its input-output curve. We are aiming to enhance the power utility of power amplifiers in different applications through introducing a new method and circuit for supplying power into a power amplifier, wherein the power supplied to the drain of the power amplifier is made to follow the envelope of the transmitted RF signal.
Type:
Grant
Filed:
September 10, 2013
Date of Patent:
November 8, 2016
Assignee:
INNOVARADIO SA
Inventors:
Amir Hooshang Farahani Samani, Alexander Greber, Jeyran Hezaveh, Ali Asghar Talebi
Abstract: The present invention concerns the field of power amplifiers and in particular the enhancement of the performance of the amplifier by a feedback loop acting on the input signal.
Type:
Grant
Filed:
November 16, 2010
Date of Patent:
September 24, 2013
Assignee:
Innovaradio SA
Inventors:
Amirhooshang Farahani Samani, Jeyran Hezaveh, Ali Talebi
Abstract: The present invention concerns the field of power amplifiers and in particular the enhancement of the performance of the amplifier by a feedback loop acting on the input signal. We present a method for linearizing a power amplifier circuit having as input signal a digital base-band input signal, (x), a power output signal 8z), a power amplifier (PA) and a linearizer module (LM).
Type:
Grant
Filed:
July 2, 2009
Date of Patent:
April 9, 2013
Assignee:
Innovaradio SA
Inventors:
Amirhooshang Farahani Samani, Jeyran Hezaveh, Ali Talebi
Abstract: The present invention concerns the field of power amplifiers and in particular the enhancement of the performance of the amplifier by a feedback loop acting on the input signal. We present a method for linearizing a power amplifier circuit having as input signal a digital base-band input signal, (x), a power output signal 8z), a power amplifier (PA) and a linearizer module (LM).
Type:
Application
Filed:
July 2, 2009
Publication date:
April 28, 2011
Applicant:
INNOVARADIO SA
Inventors:
Amirhooshang Farahani Samani, Jeyran Hezaveh, Ali Talebi