Patent application number | Description | Published |
20090102554 | Output Networks In Combination With LINC Technique - The present invention relates to balanced power amplifier network in combination with outphasing techniques such as Chireix. The object of the present invention is to provide a solution to the problem to combine balanced amplifiers like the current mode class D (CMCD) or class E/F with a LINC network. The main problem is that some power amplifiers have balanced output and the LINC network is single-ended so that a high power low loss transformer that works at several impedance levels is needed, which is hard to realize at cellular frequencies. | 04-23-2009 |
20100097153 | Switched Modulation of a Radio-Frequency Amplifier - Switch-modulation of a radio-frequency power amplifier by-representing the input signal by the I-signal ( | 04-22-2010 |
20100194480 | AMPLIFYING DEVICE - The present invention concerns an amplifying device arranged to receive an input signal having a certain duty cycle. The amplifying device comprise a first switching unit having an input terminal adapted to receive a first half of the input signal, and an output terminal adapted to be connected to a first signal output where a first half of an output signal is provided. The amplifying device comprise a second switching unit having an input terminal adapted to receive a second half of the input signal and an output terminal adapted to be connected to a second signal output where a second half of the output signal is provided. Also, the first switching unit and the second switching units are adapted to receive an input signal, wherein the first half of said input signal has the same duty cycle as the second half of the input signal but shifted in phase. The present invention also concerns a wireless transceiver and a radio transmission device. | 08-05-2010 |
20100237938 | HIGH EFFICIENCY LINEAR POWER AMPLIFIERS WITH LOAD COMPENSATION - The present invention addresses the problem to extend the dynamic power range where the amplifier operates linearly for a full input amplitude swing with improved efficiency. According to the present invention, the above presented problem is solved by changing the delivered power to the load by changing the value of the load and still keeping the amplifier in its linear condition. The invention enables the amplifier to maintain high efficiency over a wider power range. | 09-23-2010 |
20100301933 | OUTPUT NETWORKS IN COMBINATION WITH LINC TECHNIQUE - The present invention relates to balanced power amplifier network in combination with outphasing techniques such as Chireix. The object of the present invention is to provide a solution to the problem to combine balanced amplifiers like the current mode class D (CMCD) or class E/F with a LINC network. The main problem is that some power amplifiers have balanced output and the LINC network is single-ended so that a high power low loss transformer that works at several impedance levels is needed, which is hard to realize at cellular frequencies. | 12-02-2010 |
20110148518 | DYNAMIC RANGE IMPROVEMENTS OF LOAD MODULATED AMPLIFIERS - The present invention relates to methods and devices to control and operate the functionality of a power amplifier system ( | 06-23-2011 |
20130021095 | Power-Amplifier Arrangement - A power-amplifier arrangement ( | 01-24-2013 |