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| Application No. | Application Title | Issue Date |
| 20120013401 | POWER AMPLIFIER WITH SELECTABLE LOAD IMPEDANCE AND METHOD OF AMPLIFYING A SIGNAL WITH SELECTABLE LOAD IMPEDANCE A device includes: a power amplifier, including a supply voltage terminal, an input port and an output port, and the power amplifier being configured to receive a supply voltage at the supply voltage terminal, an input signal through the input port, to amplify the recei... | 01/19/2012 |
| 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 |
| 20110234316 | IMPEDANCE MATCHING CIRCUIT CAPABLE OF EFFICIENTLY ISOLATING PATHS FOR MULTI-BAND POWER AMPLIFIER In accordance with a representative embodiment, an impedance matching circuit for use at an output stage of a power amplifier is disclosed. The impedance matching circuit comprises: an input port for receiving a frequency band signal; and a plurality of paths, each path... | 09/29/2011 |
| 20110187457 | Output Buffer Circuit Capable of Enhancing Stability An output buffer circuit capable of enhancing stability includes an operational amplifier, a capacitive load and an output control unit. The operational amplifier has a positive input terminal, a negative input terminal and an output terminal, and generates an output vo... | 08/04/2011 |
| 20110187456 | Coupling Isolation Method and Operational Amplifier Using the Same A coupling isolation method for preventing a load signal from coupling into an operational amplifier is disclosed. The coupling isolation method includes generating a system signal before the operational amplifier outputs a computation result, switching off a Miller com... | 08/04/2011 |
| 20110128075 | AUDIO AMPLIFIER AND METHOD FOR RECOGNITION AN AUDIO AMPLIFIER Audio amplifiers are used in many known forms in music systems, for example for domestic use or for playing music in cinemas, discos etc., but also in public address systems, as are known, for example, in public buildings, schools, universities etc. for making announcem... | 06/02/2011 |
| 20110063028 | POWER AMPLIFIER A power amplifier comprises a plurality of primary inductors provided on a substrate in a circular geometry as a whole; a plurality of amplifier pairs; a secondary inductor; and a connection wiring. Each amplifier pair is coupled to two ends of a corresponding primary i... | 03/17/2011 |
| 20110032036 | PERFORMANCE TUNING USING ENCODED PERFORMANCE PARAMETER INFORMATION A multi-chip system in which at least one of the chips includes a performance parameter encoded thereon. After system assembly, the performance parameter can be obtained by a companion chip and used to automatically or semi-automatically fine tune the companion chip to ... | 02/10/2011 |
| 20110018632 | POWER AMPLIFIER WITH SWITCHED OUTPUT MATCHING FOR MULTI-MODE OPERATION Exemplary embodiments are directed to a transmitter with a power amplifier and a switched output matching circuit implementing a plurality of output paths for a plurality of operating modes is described. The power amplifier receives an input RF signal and provides an am... | 01/27/2011 |
| 20100283544 | HARMONIC PROCESSING CIRCUIT AND AMPLIFYING CIRCUIT USING THE SAME The present invention provides a harmonic processing circuit capable of miniaturizing a circuit, and an amplifier circuit using this harmonic processing circuit. A first impedance adjustment section and a second impedance adjustment section... | 11/11/2010 |
| 20100244956 | Current control mechanism for low voltage applications A current control mechanism for use in low power consumption circuits with limited headroom includes a differential transistor pair from whose collectors a current output is taken. The current output is a function of a reference voltage provided at bases of a reference ... | 09/30/2010 |
| 20100237939 | ADAPTIVE OPERATIONAL TRANSCONDUCTANCE AMPLIFIER LOAD COMPENSATION A buffer varies the size of its output stage in response to a varying capacitive load. The capacitive load may vary in a predictable or a random manner. The buffer includes an operational amplifier having an output stage of multiple transistors, selectively connected in... | 09/23/2010 |
| 20100231296 | Radio Frequency Power Delivery System A system and method are provided for delivering power to a dynamic load. The system includes a power supply providing DC power having a substantially constant power open loop response, a power amplifier for converting the DC power to RF power, a sensor for measuring vol... | 09/16/2010 |
| 20100060357 | RF POWER AMPLIFIER SYSTEM WITH IMPEDANCE MODULATION A power amplifier controller circuit controls an adjustable impedance matching network at the output of a power amplifier to vary its load line to improve the efficiency of the RF PA. The PA controller circuit comprises an amplitude control loop that determines an ampli... | 03/11/2010 |
| 20080180179 | RF Power Amplifier Stability Network A radio frequency (RF) generator for applying RF power to a plasma chamber includes a DC power supply (B+). A radio frequency switch generates the RF power at a center frequency f0. A low-pass dissipative terminated network connects between the DC power suppl... | 07/31/2008 |
| 20060273855 | Noise sensitive volume control device, audio device and noise sensitive volume control method Noise information is acquired by a noise detecting microphone 2, speed information is acquired by a speed sensor 1 etc, and these items of information are inputted to a microcomputer 7. The microcomputer 7 reads a program 13 stored in ... | 12/07/2006 |
| 20060130583 | Output amplifier circuit and sensor device using the same A device which includes an acceleration sensor for outputting small differential voltages VIP and VIN using resistance changes, and an output amplifier for amplifying the voltage difference. The output amplifier includes an offset-voltage adjustment circuit and an instr... | 06/22/2006 |
