Class 330/195 - Transformer coupled

Subclass of Class 330 - Amplifiers
Definition: Subject matter in which the output circuit network includes
No. of applications: 21
Last issue date: 02/16/2012

Application No.	Application Title	Issue Date
20120038420	COMMUNICATIONS CIRCUIT FOR REDUCING CROSSTALK There is provided a communications circuit for reducing crosstalk. The communications circuit for reducing crosstalk may include: a conductive power supply pattern supplying driving power applied from the outside; a first transformer implemented as an integrated passive...	02/16/2012
20110309205	FOREIGN TRACK CURRENT SUPPRESSION SYSTEM AND METHOD There is provided a track current suppression device. An exemplary device includes an input coupled between rails of a railway track and configured to receive an input voltage corresponding to a track current. The exemplary device also includes an amplifier configured t...	12/22/2011
20110304391	DECADE BANDWIDTH PLANAR MMIC FOUR PORT TRANSFORMER A wide bandwidth planar four port MMIC transformer is provided by input diplexers which divide up the incoming signal into a high band and a low band, with the resulting signals coupled to high band and low band four port transformers implemented in one embodiment using...	12/15/2011
20110298539	RF POWER AMPLIFIER CIRCUIT WITH MISMATCH TOLERANCE A radio frequency (RF) power amplifier system adjusts the supply voltage provided to a power amplifier (PA) adaptively, responsive to the measured or estimated power of the RF output signal of the PA. The RF PA system includes a power amplifier (PA) which receives and a...	12/08/2011
20110204976	IMPEDANCE TRANSFORMER, INTEGRATED CIRCUIT DEVICE, AMPLIFIER, AND COMMUNICATOR MODULE An impedance transformer includes a first transmission line having a first impedance and provided over a first substrate having a first permittivity; a second transmission line and a third transmission line having an impedance lower than the first impedance and provided...	08/25/2011
20110140781	IMPEDANCE MATCHING CIRCUIT ELIMINATING INTERFERENCE BETWEEN SIGNAL LINES AND POWER AMPLIFIER HAVING THE SAME Disclosed are an impedance matching circuit preventing the occurrence of inter-line interference by making currents at adjacent lines flow in the same direction, and a power amplifier having the same. The impedance matching circuit eliminating interference between signa...	06/16/2011
20110121898	WIRELESS APPARATUS HAVING SHIELDING FUNCTION There is provided a wireless apparatus having a shielding function for shielding signal interference between driving power from a power amplifier and a conductive wire of a coupler. The wireless apparatus having a shielding function, includes an amplifying unit receivin...	05/26/2011
20100283327	METHOD AND APPARATUS FOR TRANSMISSION OF ENERGY AND DATA In a method and in an apparatus for transmission of energy and data, with a primary side, on which an amplifier is arranged, with a secondary side, on which a data source, e.g. a measuring sensor, is arranged, and with a plug-together assembly inductively coupling, galv...	11/11/2010
20100259328	AUDIO FREQUENCY AMPLIFIER An amplifier is operable in push-pull mode, single-ended mode, or a composite mode that is an intermediate between single-ended and Push-pull modes. Moreover, at least one output device may be configured to operate using a high performance AC servo loop that functions t...	10/14/2010
20100052782	TRANSFORMER AND STRUCTURE THEREOF AND POWER AMPLIFIER A transformer and a structure thereof and a power amplifier are provided. The transformer includes a first inductor to a fourth inductor, a first capacitor, and a second capacitor. A first terminal of the first inductor receives a first signal. A first terminal of the s...	03/04/2010
20100026389	DUAL MODE POWER AMPLIFIER OUTPUT NETWORK A dual mode power amplifier output network is provided that includes a load switch and an auto transformer having a primary winding and a secondary winding. The load switch is connected to the secondary winding of the auto transformer....	02/04/2010
20100007416	WIDEBAND DIFFERENTIAL AMPLIFIER INCLUDING SINGLE-ENDED AMPLIFIERS COUPLED TO A FOUR-PORT TRANSFORMER A differential amplifier is formed from a first single-ended amplifier circuit, a second single-ended amplifier circuit, and a four-port transformer circuit coupled to the first and second single-ended amplifier circuits to form the differential amplifier....	01/14/2010
20090273397	Controlling power with an output network In one embodiment, the present invention includes multiple gain stages and an output network coupled to the gain stages. Each of the gain stages can be independently controlled to amplify a radio frequency (RF) signal to an output power level for transmission from a mob...	11/05/2009
20090174477	MULTI-SEGMENT PRIMARY AND MULTI-TURN SECONDARY TRANSFORMER FOR POWER AMPLIFIER SYSTEMS Embodiments of the invention may provide for power amplifier systems and methods. The systems and methods may include a power amplifier that generates a first differential output signal and a second differential output signal, a primary winding comprised of a plurality ...	07/09/2009
20090115509	Systems and Methods for Isolating an Analog Signal An accurate linear equivalent of an analog signal may be produced across an isolation barrier by driving a primary transformer winding with a drive amplifier and compensation amplifier, where the compensation operational amplifier amplifies a difference between a signal...	05/07/2009
20080218263	Wideband differential amplifier including single-ended amplifiers coupled to a four-port transformer A differential amplifier is formed from a first single-ended amplifier circuit, a second single-ended amplifier circuit, and a four-port transformer circuit coupled to the first and second single-ended amplifier circuits to form the differential amplifier....	09/11/2008
20080164941	Systems and methods for power amplifiers with voltage boosting multi-primary transformers Systems and methods may be provided for a power amplifier system. The systems and methods may include a plurality of power amplifiers, where each power amplifier includes at least one output port. The systems and methods may also include a plurality of primary windings ...	07/10/2008
20080007335	Power amplifier A power amplifier based on a voltage-coupling scheme is disclosed. The power amplifier includes two active elements connected to each other via a primary part of a transformer, in which one of the two active elements is connected to a power-supply voltage of the amplifi...	01/10/2008
20070046371	Power amplifier A radio frequency power amplifier including control electronics for providing control signals for timing of the power amplifier. A first group of the drivers are coupled to the control electronics and a second group of drivers are coupled to the control electronics. The...	03/01/2007
20060261889	System and method for employing variable magnetic flux bias in an amplifier A system and method for employing variable magnetic flux bias in an amplifier. The amplifier system comprises an output transformer and a magnetic sensor configured to sense a first magnetic flux of the output transformer. The magnetic sensor generates a flux signal res...	11/23/2006
20050258899	Amplifier circuit An amplifier circuit includes a transistor having a control terminal, a first and a second terminal, a signal input terminal coupled to the control terminal of the transistor, as well as a transformer with a primary side and a secondary side, the primary side of which i...	11/24/2005

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Class 330/195 - Transformer coupled