Patent application number | Description | Published |
20090309658 | METHOD AND APPARATUS FOR POWER CONVERTER FOR CLASS D AUDIO POWER AMPLIFIERS - A method and apparatus for power conversion in a class D amplifier is provided. The power conversion is achieved using synchronous rectifiers in a regulated half bridge power supply, taking the sum of the positive and negative rails as feedback, in order facilitate energy transfer between positive and negative output rails. This minimizes the effects of off side charging and rail sag, as well as achieving good line regulation, while allowing use of very small, low value output capacitors. | 12-17-2009 |
20110182087 | METHOD AND APPARATUS FOR POWER CONVERTER FOR CLASS D AUDIO POWER AMPLIFIERS - A method and apparatus for power conversion in a class D amplifier is provided. The power conversion is achieved using synchronous rectifiers in a regulated half bridge power supply, taking the sum of the positive and negative rails as feedback, in order facilitate energy transfer between positive and negative output rails. This minimizes the effects of off side charging and rail sag, as well as achieving good line regulation, while allowing use of very small, low value output capacitors. | 07-28-2011 |
20110193597 | METHOD AND APPARATUS FOR PRODUCING TRIANGULAR WAVEFORM WITH LOW AUDIO BAND CONTENT - A triangular waveform generator includes a square waveform clock circuit and an active integrator. The active integrator receives input from the square waveform clock circuit and generates a triangular waveform output. An active feedback network is operatively added to the active integrator to reduce the audio band noise content in the triangular waveform output. The feedback network acts as a DC balance without significant sacrifice in the linearity of the triangular waveform output. | 08-11-2011 |
20120223747 | Method and Apparatus for Producing Triangular Waveform with Low Audio Band Content - A triangular waveform generator includes a square waveform clock circuit and an integrating circuit. The integration circuit receives input from the square waveform clock circuit and generates a triangular waveform output. A feedback circuit is operatively connected to the integrating circuit to reduce the audio band noise content in the triangular waveform output. The feedback circuit acts as a DC balance without significant sacrifice in the linearity of the triangular waveform output. | 09-06-2012 |
20130038392 | POWER SUPPLY METHOD AND APPARATUS - A method and apparatus for providing a power supply for an amplifier is provided. The power conversion is achieved using synchronous rectifiers in a regulated half bridge power supply, taking the sum of the positive and negative rails as feedback, in order facilitate energy transfer between positive and negative output rails. This minimizes the effects of off side charging and rail sag, as well as achieving good line regulation, while allowing use of very small, low value output capacitors. | 02-14-2013 |
20130314133 | METHOD AND APPARATUS FOR PRODUCING TRIANGULAR WAVEFORM WITH LOW AUDIO BAND NOISE CONTENT - A triangular waveform generator includes a square waveform clock circuit and an integrating circuit. The integration circuit receives input from the square waveform clock circuit and generates a triangular waveform output. A feedback circuit is operatively connected to the integrating circuit to reduce the audio band noise content in the triangular waveform output. The feedback circuit acts as a DC balance without significant sacrifice in the linearity of the triangular waveform output. | 11-28-2013 |
20140266442 | VOLTAGE CONTROLLED AMPLIFIER AND METHOD OF USING THE SAME - A simplified VCA circuit is presented. The VCA of the present invention uses fewer components and is less complex than prior art OTA-based VCAs. Further, the VCA of the present invention has improved total harmonic distortion (THD) and DC offset characteristics as compared to prior art VCAs. The VCA may be used to prevent clipping with the addition of clipping detection circuitry. | 09-18-2014 |
20140268930 | POWER SUPPLY METHOD AND APPARATUS - A method and apparatus for providing a power supply for an amplifier is provided. The power conversion is achieved using synchronous rectifiers in a regulated half bridge power supply, taking the sum of the positive and negative rails as feedback, in order facilitate energy transfer between positive and negative output rails. This minimizes the effects of off side charging and rail sag, as well as achieving good line regulation, while allowing use of very small, low value output capacitors. | 09-18-2014 |
20140312939 | METHOD AND APPARATUS FOR REDUCING AUDIO BAND NOISE IN A PERIODIC WAVE SIGNAL - A triangular waveform generator includes a square waveform clock circuit and an integrating circuit. The integration circuit receives input from the square waveform clock circuit and generates a triangular waveform output. A feedback circuit is operatively connected to the integrating circuit to reduce the audio band noise content in the triangular waveform output. The feedback circuit acts as a DC balance without significant sacrifice in the linearity of the triangular waveform output. | 10-23-2014 |
Patent application number | Description | Published |
20100004237 | 2-Amino-7,8-dihydro-6H-pyrido[4,3-D]pyrimidin-5-ones - Disclosed are 2-amino-7,8-dihydro-6H-pyrido[4,3-d]pyrimidin-5-one compounds, their stereoisomers, tautomers, pharmaceutically acceptable salts, and prodrugs thereof; compositions that include a pharmaceutically acceptable carrier and one or more of the 2-amino-7,8-dihydro-6H-pyrido[4,3-d]pyrimidin-5-one compounds, either alone or in combination with at least one additional therapeutic agent. Disclosed also are methods of using the 2-amino-7,8-dihydro-6H-pyrido[4,3-d]pyrimidin-5-one compounds, either alone or in combination with at least one additional therapeutic agent, in the prophylaxis or treatment of cellular proliferative, viral, autoimmune, cardiovascular, and central nervous system diseases. | 01-07-2010 |
Patent application number | Description | Published |
20080200462 | SUBSTITUTED PYRAZOLE AND TRIAZOLE COMPOUNDS AS KSP INHIBITORS - Disclosed are new substituted pyrazole and triazole compounds of Formula (I) and pharmaceutically acceptable salts, esters or prodrugs thereof, compositions of the derivatives together with pharmaceutically acceptable carriers, and uses thereof: | 08-21-2008 |
20090258016 | Substituted imidazole derivatives - The present invention relates to new substituted imidazole compounds and pharmaceutically acceptable salts, esters or prodrugs thereof, compositions of the new compounds together with pharmaceutically acceptable carriers, and uses of the new compounds. The compounds of the invention have the following general formula: | 10-15-2009 |
20130017196 | SUBSTITUTED IMIDAZOLE DERIVATIVES - The present invention relates to new substituted imidazole compounds and pharmaceutically acceptable salts, esters or prodrugs thereof, compositions of the new compounds together with pharmaceutically acceptable carriers, and uses of the new compounds. The compounds of the invention have the following general formula: | 01-17-2013 |