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| Number | Title | Issue Date |
| 8188789 | Apparatus for improving performance at low power region in a Doherty amplifier A method and apparatus improve the performance of a carrier amplifier in a Doherty amplifier. The Doherty amplifier includes a power divider, a carrier amplifier, at least one peaking amplifier, offset lines, and a Doherty circuit. The power divider provides a power... | 05/29/2012 |
| 8164384 | Asymmetric multilevel outphasing architecture for RF amplifiers A radio frequency (RF) circuit includes a power supply configured to generate a plurality of voltages, a plurality of power amplifiers, each having an RF output port and a power supply input port, a switch network having a plurality of input ports coupled to the pow... | 04/24/2012 |
| 8154339 | V-band high-power transmitter with integrated power combiner A wireless communications system includes a first multiplexer distribution network fed by a radio frequency input; a plurality of multi-stage power amplifiers fed by the first multiplexer distribution network, wherein each one of the multi-stage power amplifiers inc... | 04/10/2012 |
| 8115546 | Apparatus and method for maximizing performance of peaking amplifier in doherty amplifier An apparatus and method for maximizing the performance of a peaking amplifier in a Doherty amplifier are provided. The apparatus includes a splitter, a carrier amplifier, an (N−1) number of peaking amplifiers, a Doherty combiner, and an output load. The splitter s... | 02/14/2012 |
| 8102206 | Multi-path, multi-stage feed-forward operational amplifier circuit An embodiment of an amplifier circuit includes a plurality of amplifiers connected between input and output terminals to form at least partially parallel amplification paths between the terminals. A first plurality of the amplification paths include series-connected... | 01/24/2012 |
| 8098092 | Power amplifier A Doherty amplifier is provided with a clipping circuit for making signal power flow to ground if the signal power becomes equal to or higher than a predetermine value in order to prevent a carrier amplifier, which is a small amplifier, from being destroyed if the s... | 01/17/2012 |
| 8072263 | Power control device for a signal with optimized input dynamics A signal power control device comprises two amplification channels. A first amplification channel comprises a first transconductance amplifier and a second amplification channel comprises an attenuator mounted in series with a second transconductance amplifier. Gain... | 12/06/2011 |
| 8072264 | Amplifying device The present invention concerns a composite amplifier and a method for controlling the amplitude of a composite amplifier in a node of a wireless communication system. The composite amplifier comprises a first amplifier and a second amplifier that are arranged to be ... | 12/06/2011 |
| 8054126 | Dynamic bias supply devices A dynamic bias supply device for multiple parallel power amplifiers, in which a plurality of parallel power amplifiers including a Doherty amplifier are connected in parallel, is provided. The dynamic bias supply device includes a plurality of switches respectively ... | 11/08/2011 |
| 8049558 | Switchable balanced amplifier A switchable balanced amplifier having multiple, configurable independent input/output paths. Switching networks coupled to the input and/or output quadrature couplers of the balanced amplifier are used to configurably direct any of one or more input signals to any ... | 11/01/2011 |
| 8035445 | Frequency response compensation amplifier arrangements An embodiment of the present invention provides a system comprising a summing device and first amplifier portion. The summing device is coupled to an output node. The first amplifier portion is coupled between an input node and the summing device. The first amplifie... | 10/11/2011 |
| 8035444 | Amplifier apparatus An amplifier capable of lowering an electrical current flowing in a peak amplifier before a carrier amplifier becomes saturated to thereby improve the efficiency of an entirety of the amplifier is provided. The amplifier includes a carrier amplifier circuit having a... | 10/11/2011 |
| 8026763 | Asymmetric multilevel outphasing architecture for RF amplifiers A radio frequency (RF) circuit includes a power supply configured to generate a plurality of voltages, a plurality of power amplifiers, each having an RF output port and a power supply input port, a switch network having a plurality of input ports coupled to the pow... | 09/27/2011 |
| 8026762 | High efficiency transmitter for wireless communication The present invention provides an amplifier for a wireless transmitter. In one embodiment, the amplifier includes a signal separator for decomposing an input signal into constant envelope signals and amplifier circuits for amplifying the constant envelope signals. T... | 09/27/2011 |
| 8026764 | Generation and amplification of substantially constant envelope signals, including switching an output among a plurality of nodes Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 09/27/2011 |
| 8022759 | 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 (100) capable of operating in at least three differential amplification modes. The drive signal's amplitude envelope controls an integrat... | 09/20/2011 |
| 8022760 | 3-way Doherty amplifier with minimum output network A 3-way Doherty amplifier has an amplifier input and an amplifier output. The amplifier has a main stage, a first peak stage and a second peak stage. The amplifier has an input network connecting the amplifier input to the inputs of the stages, and an output network... | 09/20/2011 |
| 8018276 | Signal processing method and power amplifier device A signal processing method and power amplifier device are disclosed. The method may include receiving a signal to be transmitted, decomposing an original signal into a plurality of smaller constant-amplitude signals, wherein a vector sum each of the smaller constant... | 09/13/2011 |
| 7999613 | Method and apparatus for an improved power amplifier An amplifier system is provided that has a first balun with an input and an output, and a second balun with an input and an output. A first set of amplifiers is coupled in series and to the output of the first balun. A second set of amplifiers is coupled in series a... | 08/16/2011 |
| 7994854 | Circuit with a power amplifier and amplification method In a power amplification circuit an output signal is generated by combining the power of a first and second signal that have been amplified separately. An input signal is received that indicates a desired amplitude and phase of the output signal. A controllable phas... | 08/09/2011 |
| 7973600 | Doherty power amplifier The present invention relates to a power amplifier; and, more particularly, to a Doherty power amplifier. The power amplifier includes at least one carrier amplifier; at least one peaking amplifier arranged in parallel with the carrier amplifier in such a manner tha... | 07/05/2011 |
| RE42447 | Chireix architecture using low impedance amplifiers Circuits and methods for use in amplifying amplitude and phase modulated signals. A circuit uses a combiner with dual parallel signal amplifiers feeding it. The signal amplifiers have a low output impedance while the combiner does not provide any isolation between i... | 06/14/2011 |
| 7944293 | Systems and methods for an adaptive bias circuit for a differential power amplifier Systems and methods for providing an adaptive bias circuit that may include a differential amplifier, low-pass filter, and common source amplifier or common emitter amplifier. The adaptive bias circuit may generate an adaptive bias output signal depending on input s... | 05/17/2011 |
| 7936213 | Doherty amplifier and signal amplification system having the same, method for amplifying signal A Doherty amplifier is provided. The Doherty amplifier includes a first path circuit including a carrier amplifier and a first impedance adjusting circuit connected with the carrier amplifier; and a second path circuit including a peaking amplifier, a second impedan... | 05/03/2011 |
| 7936212 | Progressive power generating amplifiers A power amplifier circuit includes an unequal power splitter that splits an input signal using an unequal power split and provides a first power level signal and a second power level signal. A first amplifier path includes a first transistor amplifier that amplifies... | 05/03/2011 |
| 7928801 | Systems and methods of amplification based on array processed intermodulation suppression Systems and methods for achieving linear amplification with high efficiency are provided. An input signal is amplified using a plurality of amplifiers by dividing the input signal into a plurality of inputs signals, amplifying the plurality of input signals with the... | 04/19/2011 |
| 7907009 | High frequency amplifier Provided is a high frequency amplifier including two amplifying elements of different element sizes connected in parallel and switching the amplifying elements in accordance with a level of output power. In particular, the high frequency amplifier includes an output... | 03/15/2011 |
| 7902921 | 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 (CMC... | 03/08/2011 |
| 7893761 | Monotonic and voltage supply independent automatic gain control amplifier A method and circuit are provided wherein the magnitude of an RF signal provided by RF circuit is used to derive a control set point of the RF circuit via an intermediate controller circuit. This controller circuit having the specific function of providing the actua... | 02/22/2011 |
| 7893762 | Efficient composite amplifier A detuned composite amplifier includes a nonlinear drive function (22) that has a phase that varies with the composite amplifier output voltage amplitude. The nonlinear drive function (22) is configured to transform the output voltage transition point ... | 02/22/2011 |
| 7888999 | Premium power amplifier The present invention discloses a premium power amplifier applied in an antenna module, and the premium power amplifier includes a first transmission unit, having two symmetrical and identical first arc-shaped circuits, two secondary power amplifiers connected in pa... | 02/15/2011 |
| 7884668 | Integrated doherty type amplifier arrangement with high power efficiency The present invention relates to an integrated Doherty type amplifier arrangement and an amplifying method for such an arrangement, wherein a lumped element hybrid power divider (12) is provided for splitting input signals of main and peak amplifier stages ( | 02/08/2011 |
| 7872526 | Balanced amplifying device having a bypass branch A balanced amplifier includes a bypass branch (19), termination elements (TE1, TE2) and an amplifying section (10). The section (10) includes amplifiers (A1, A2), first coupling/splitting unit (14) having a fir... | 01/18/2011 |
| 7863979 | High efficiency power amplifier having embedded switching A power amplifier includes at least one amplification path comprising at least a first amplification device and a second amplification device, where the first amplification device has a common control terminal to provide amplification when biased on and to prevent c... | 01/04/2011 |
| 7859333 | Power amplifier with reconfigurable direct current coupling Embodiments of circuits, systems, and methods relating to a power amplifier with a reconfigurable direct current coupling are disclosed. Other embodiments may be described and claimed. ... | 12/28/2010 |
| 7847630 | Amplifier There is provided an amplifier for combining outputs of a plurality of amplifying circuits to generate an amplifier output. The amplifier includes a first amplifying circuit for operating a first amplifying device in class-AB, wherein the first amplifying circuit is... | 12/07/2010 |
| 7804358 | Device with shared power amplifiers, for use in a wireless telecommunications system A device with shared power amplifiers for use in a wireless telecommunication System. A plurality of input signals are tapered to alter the phase and/or amplitude distribution between the signals and are then distributed over the input ports of a plurality of power ... | 09/28/2010 |
| 7800442 | 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 (CMC... | 09/21/2010 |
| 7795966 | Balanced amplifier with protection circuit According to an exemplary embodiment, a balanced amplifier includes an in-phase amplifier coupled to a first input port of an output coupler and a quadrature amplifier coupled to a second input port of the output coupler. The balanced amplifier further includes an i... | 09/14/2010 |
| 7786797 | Amplifying apparatus The amplifying apparatus includes an amplifier having a circuit constant determined so as to satisfy a condition for E-class operation; power detecting unit which detects an output electricity from the amplifier; and controlling unit which controls the circuit const... | 08/31/2010 |
