Patent application number | Description | Published |
20080246547 | Method And System for Output Matching of Rf Transistors - A high frequency power device ( | 10-09-2008 |
20090174482 | HIGH POWER INTEGRATED RF AMPLIFIER - An integrated HF-amplifĂer structure comprises in a first direction (FD) in the order mentioned: an input bond pad (IBP), a plurality of cells (CE | 07-09-2009 |
20090179702 | DOHERTY AMPLIFIER - An integrated Doherty amplifier structure comprises an input bond pad (IBP), and an output bond pad (OBP). A first transistor (T | 07-16-2009 |
20090212858 | 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 ( | 08-27-2009 |
20100001802 | 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 ( | 01-07-2010 |
20100026387 | INTEGRATED DOHERTY TYPE AMPLIFIER ARRANGEMENT WITH HIGH POWER EFFICIENCY - The present invention shows a Doherty type of amplifier arrangement comprising a plurality of parallel unit cells. Each unit cell is of relatively low power. Suitably it comprises a compensation circuit at the input of the main amplifier and peak amplifier stage. | 02-04-2010 |
20100164632 | POWER AMPLIFIER - A radio frequency power amplifier has first and second amplifier stages coupled in series, one of which is operated in class F and the other is operated in inverse class F; an envelope detector adapted to detect an envelope of the input signal; a power supply coupled to supply an electrical supply voltage to the first and second amplifier stages, wherein the electrical supply voltage is controlled to follow the envelope of the input signal. Such amplifier makes it possible to maintain class F and inverse class F operation, respectively, of the first and second amplifier stages independent on the input signal. Preferably, this is done by controlling the electrical supply voltage so that the saturation levels of the first and second amplifier stages follow the envelope of the input signal. | 07-01-2010 |
20100188147 | MULTI-WAY DOHERTY AMPLIFIER - An electronic circuit has a multi-way Doherty amplifier. The multi-way Doherty amplifier comprises a two-way Doherty amplifier with a main stage and a first peak stage that are integrated in a semiconductor device; and at least one further peak stage implemented with a discrete power transistor. | 07-29-2010 |
20100188164 | POWER DEVICE AND A METHOD FOR CONTROLLING A POWER DEVICE - An RF power device that includes a transistor with a compact impedance transformation circuit, where the transformation circuit includes a lumped element CLC analogue transmission line and an associated embedded directional bilateral RF power sensor that is inductively coupled to the transmission line to provide detection of direct and reflected power independently with high directivity. | 07-29-2010 |
20110140783 | DOHERTY AMPLIFIER WITH COMPOSED TRANSFER CHARACTERISTIC HAVING MULTIPLE PEAK AMPLIFIERS - A combination amplifier ( | 06-16-2011 |
20110140786 | DOHERTY AMPLIFIER - A combination amplifier, in particular a Doherty amplifier allowing dynamic biasing, is provided, the combination amplifier comprising a first amplifier ( | 06-16-2011 |
20110204980 | INTEGRATED DOHERTY AMPLIFIER - The invention relates to an integrated Doherty amplifier with an input network connecting the input to the main stage and to the peak stage, and with an output network connecting the main stage and the peak stage to the output. The output network has a shunt capacitor to signal-ground in parallel to a parasitic capacitance of the main stage, and has a shunt inductor between the main stage and signal ground. The shunt configuration enables to use the MMIC Doherty amplifier in a wide frequency range. At least some of the inductors of the input network and/or output network are implemented using bond wires. Their orientations and locations provide minimal mutual electromagnetic coupling between the wires and the return RF current paths. | 08-25-2011 |
20110291772 | Inductive Circuit Arrangement - A bond wire circuit includes at least three bond wires arranged to split an input signal into two output signals. In connection with various example embodiments, bond wires are arranged in a generally parallel manner to mitigate magnetic coupling and related issues for splitting an input signal and providing each of split signals to an amplifier. The bond wires are connected by capacitive circuits that facilitate the splitting, and in some applications, additional capacitive (to ground/reference) and load circuits to further facilitate the splitting of the input signals for specific amplifier circuit implementations, and applications to various loads. In some implementations, the input signals are split in equal or arbitrary portions with frequency independent phase differences in a wide frequency band, with isolation between ports of the circuit. | 12-01-2011 |
20120133442 | RADIOFREQUENCY AMPLIFIER - An integrated radiofrequency amplifier with an operational frequency includes first and second Doherty amplifiers each having a main device, and a peak device connected at respective inputs and outputs by respective phase shift elements configured to provide a 90 degree phase shift at the operational frequency. An input of the amplifier is connected to the input of the main device of the first Doherty amplifier, an output of the amplifier is connected to the outputs of the peak devices of the first and second Doherty amplifiers and the input of the peak device of the first Doherty amplifier is connected to the input of the main device of the second Doherty amplifier by a phase shift element providing a 90 degree phase shift at the operational frequency. | 05-31-2012 |
20120146723 | RADIOFREQUENCY AMPLIFIER - The invention relates to high power radiofrequency amplifiers, in particular to amplifiers having output impedance matching networks, exemplary embodiments of which include a radiofrequency amplifier having an active device mounted on a substrate within a device package, the amplifier having an output impedance matching network comprising a high pass network provided at least partly on the active device and a low pass network having a first inductive shunt connection between an output of the active device and a first output lead and a second inductive shunt connection between the output of the active device and a second output lead, wherein part of the second output lead forms an inductance contributing to the inductance of the low pass network. | 06-14-2012 |
20130120061 | Doherty Amplifier Circuit - The present invention relates to an amplifier comprising a plurality of Doherty amplifier cells each Doherty amplifier cell comprising an input and an output respectively connected to an input and an output of the amplifier, a main amplifier stage, a peak amplifier stage and a signal combining circuit configured to combine signals from outputs of the main and peak amplifiers and provide a combined signal to the output of the Doherty amplifier cell. Each cell comprises a controllable splitter having an input connected to the input of the Doherty amplifier cell. The controllable splitter is configured to receive a splitter control signal and modify an amplitude and phase of a signal at the input of the Doherty amplifier cell in response to the splitter control signal. | 05-16-2013 |