Patent application number | Description | Published |
20090021301 | Efficient Composite Amplifier - A detuned composite amplifier includes a nonlinear drive function ( | 01-22-2009 |
20090163154 | Method For Compensating Signal Distortions in Composite Amplifiers - A method for compensating signal distortions in multiple transmitting branches ( | 06-25-2009 |
20090176466 | Apparatuses and a Method for Reducing Peak Power in a Transmitter of Telecommunications Systems - The present invention relates to an apparatus ( | 07-09-2009 |
20090191827 | APPARATUSES AND A METHOD FOR REDUCING PEAK POWER IN TELECOMMUNICATIONS SYSTEMS - The present invention relates to an apparatus for reducing peak power in a transmitter for use in telecommunications systems. The invention also relates to a method for reducing peak power in a transmitter for use in telecommunications system and to a base station including such an apparatus. An apparatus according to the invention includes n subsequent interconnected stages ( | 07-30-2009 |
20100008442 | Method for Limiting Local Bandwidth Impairment Using Tone Reservation - The present invention relates to a method of limiting local bandwidth impairment in a telecommunications system, wherein tone reservation is used to reduce peak power of a multi-carrier signal using successive processing stages. The present invention also relates to an apparatus for limiting local bandwidth impairment and to a base station including such an apparatus. The method according to the present invention comprises the steps: generating a first peak reduction signal using reserved frequencies or tones of a first subset of frequencies or tones; generating a second peak reduction signal using reserved frequencies or tones of a second subset of frequencies or tones; extracting the In-phase components, I-components, of the first peak reduction signal and extracting the Quadrature components, Q-components, of the second peak reduction signal; and generating a third peak reduction signal by combining or adding, in the frequency domain, the I-components of the first peak reduction signal and the Q-components of the second peak reduction signal. | 01-14-2010 |
20100019843 | Method For Controlling A Linear Amplifier And Power Amplifier Arrangement - The present invention relates to a method for controlling an amplifier unit having at least one drive signal input connection | 01-28-2010 |
20100029347 | APPARATUSES AND A METHOD FOR REDUCING PEAK POWER IN A TRANSMITTER OF TELECOMMUNICATIONS SYSTEMS - The present invention relates to an apparatus ( | 02-04-2010 |
20100173596 | FEED FORWARD NOISE REDUCTION IN A TRANSMITTER - A circuit ( | 07-08-2010 |
20100244949 | Composite Amplifier, a Radio Terminal and a Method for Improving the Efficiency of the Composite Amplifier - The present invention relates to a composite amplifier ( | 09-30-2010 |
20110163814 | Hybrid Class Amplifier - A power amplifier ( | 07-07-2011 |
20110254628 | Multi-Stage Amplifier - The disclosed multi-stage amplifier ( | 10-20-2011 |
20110254629 | MULTI STAGE AMPLIFIER - A multi-stage amplifier includes a first, a second, and a third sub-amplifier, each with respective input and output ports. The multi-stage amplifier also includes a common output port. The output port of the second sub-amplifier is connected to the output port of the first sub-amplifier as well as to the common output port of the multi-stage amplifier, and the output port of the third sub-amplifier is connected to the common output port. The electrical lengths of the connections from the second sub-amplifier's output port both to the first amplifier's output port and to the common output port are longer or shorter than one quarter of a wavelength (λ) of the frequency for which the multi-stage amplifier is intended to operate. | 10-20-2011 |
20120126886 | METHOD AND ARRANGEMENT IN A MOBILE COMMUNICATION SYSTEM - The present invention relates to an amplifier circuit where a load modulation is applied to a segmented amplifier. This will reduce the shunt loss since the loss of a segmented amplifier is reduced by allowing each amplifier segment or combination of segments to operate to their full output power capacity, rather than limited to a lower output power which results in a higher shunt loss. Hence, operation to full capacity before adding more segments is made possible by dynamically modulating the load. | 05-24-2012 |
20120139628 | METHOD AND ARRANGEMENT IN A MOBILE COMMUNICATIONS SYSTEM - The invention is based on the fact that the current output from a DDB controlled amplifier in backoff, i.e. for low amplitudes, is reduced more or less linearly with the amplitude of the signal to be amplified. Therefore, it is enough to use smaller amplifiers which are able to output the necessary RF current. Hence, according to the present invention, the total DDB amplifier is divided into smaller parts that are coupled to the output only when needed. | 06-07-2012 |
20130106520 | HYBRID CLASS AMPLIFIER | 05-02-2013 |
20130321075 | Method For Compensating Signal Distortions in Composite Amplifiers - A method for compensating signal distortions in multiple transmitting branches entering a composite amplifier. | 12-05-2013 |
20130321084 | APPARATUS AND METHOD FOR USE WITH AN AMPLIFIER CIRCUIT - An output network for use with a multi-transistor amplifier circuit comprises N transistors configured to provide a Chireix outphasing behaviour. The N transistors coupled to receive different amplitude and/or phase signals relative to a source signal. The output network comprises: a plurality of branches arranged in a hierarchical structure between N input nodes and an output node; at least one branch connection arranged between the input nodes and the output node, wherein each branch connection is arranged to couple first and second branches from an input side to a single branch on an output side. The hierarchical structure is arranged asymmetrically such that at least one branch connection comprises a different number of input nodes ultimately connected to its first branch compared to the number of input nodes ultimately connected to its second branch. | 12-05-2013 |
20140320213 | RADIO FREQUENCY POWER AMPLIFIER CIRCUIT AND METHOD - An amplifier circuit is disclosed for providing a radio frequency output signal having a variable signal envelope, comprising a main amplifier device and an auxiliary amplifier and a combiner network for combining an output signal from said first amplifier device and a second output signal from said second amplifier device to provide a combined output signal of variable signal envelope to a load, and a signal processing circuit comprising an input and a non-linear processing section to provide at least said second radio frequency output signal with a signal envelope that has a non-linear dependency from an amplitude characteristic of the input signal such that the degree of non-linearity of the non-linear dependency varies dependent on the amount of change per time unit of the amplitude characteristic of the input signal. Further, a method of power amplifying a radio frequency signal having a variable signal envelope is disclosed. | 10-30-2014 |