| Patents for H03F 99 - Subject matter not provided for in other groups of this subclass (812) |
|---|
| 06/10/2008 | US7385446 High-impedance level-shifting amplifier capable of handling input signals with a voltage magnitude that exceeds a supply voltage |
| 06/03/2008 | US7382187 Semiconductor integrated circuit and amplifier for suppressing pop sound while minimizing voltage transition settling time |
| 05/29/2008 | US20080123874 Audio amplifier system |
| 05/22/2008 | WO2008024665A3 Energy-efficient consumer device audio power output stage |
| 05/15/2008 | US20080112580 Water bottle amplifier unit for a bicycle audio system |
| 05/07/2008 | EP1917715A2 High sensitivity rfid tag integrated circuits |
| 05/01/2008 | US20080101628 Switching amplifier circuits and methods |
| 04/17/2008 | WO2007070590A3 Multi-channel noise reduction system with direct instrument tracking |
| 04/17/2008 | DE112005003303T5 Portables multifunktionales Audio-Soundsystem und Verfahren dafür Portable multifunctional audio sound system and method therefor |
| 04/16/2008 | EP1912466A1 Sound receiver |
| 04/03/2008 | US20080080726 Audio Amplifier Capable of Performing Self-Oscillation |
| 04/01/2008 | US7352246 Noise-shaping amplifier with waveform lock |
| 03/27/2008 | US20080075307 Digital Signal Processing Amplifier |
| 03/19/2008 | EP1588347A4 Circuit and method for providing an auto-off and/or auto-on capability for an audio device |
| 03/13/2008 | US20080063220 Audio control method and audio processing system |
| 03/13/2008 | US20080063219 Controlling audio output of a mobile terminal |
| 03/12/2008 | CN100375391C Double-usage of integrated circuit tube pin and signal switch over on the pin |
| 03/04/2008 | US7340272 Mobile communication terminal having a three-dimensional surround sound effect and its control method |
| 02/28/2008 | WO2008024665A2 Energy-efficient consumer device audio power output stage |
| 02/21/2008 | US20080044041 Energy-efficient consumer device audio power output stage |
| 02/07/2008 | DE102006034349B3 Integrator und Fehlerverstärker Integrator and error amplifier |
| 01/31/2008 | WO2008012331A1 Integrator and error amplifier |
| 01/31/2008 | US20080025531 Microphone amplifier |
| 01/31/2008 | US20080024209 Integrator and error amplifier |
| 01/31/2008 | US20080024186 Amplifier Circuit, Semiconductor Device and Electronic Apparatus |
| 01/30/2008 | CN101115328A Microphone amplifier |
| 01/22/2008 | US7321661 Current feedback system for improving crossover frequency response |
| 01/10/2008 | US20080008337 Usb hub with a usb powered speaker |
| 01/09/2008 | CN101103505A Method and topology to switch an output stage in a class ab audio amplifier for wireless applications |
| 01/09/2008 | CN101103391A Portable multi-functional audio sound system and method therefor |
| 01/03/2008 | WO2008000907A1 Passive amplification of signals |
| 01/03/2008 | US20080002843 Ripple digital amplifier system |
| 01/03/2008 | US20080001659 Passive amplification of signals |
| 12/27/2007 | US20070296491 Noise-shaping amplifier with waveform lock |
| 12/25/2007 | US7312662 Cascode gain boosting system and method for a transmitter |
| 12/13/2007 | US20070285159 High-impedance level-shifting amplifier capable of handling input signals with a voltage magnitude that exceeds a supply voltage |
| 12/13/2007 | US20070285157 Distribution of Radio-Frequency Signals in an Electronic Circuit |
| 12/11/2007 | US7307474 Integrated booster amplifier |
| 11/01/2007 | US20070252645 Amplifier circuit of BTL system |
| 10/24/2007 | CN101060311A A digital phase-lock amplifier |
| 10/18/2007 | WO2006124491A3 Noise-shaping amplifier with waveform lock |
| 10/16/2007 | US7283001 Noise-shaping amplifier with waveform lock |
| 10/03/2007 | EP1839378A2 Method and topology to switch an output stage in a class ab audio amplifier for wireless applications |
| 09/27/2007 | WO2007108929A2 Two-wire microphone circuit |
| 09/27/2007 | US20070223741 Audio amplifier and methods for use therewith |
| 09/20/2007 | US20070217628 Two-wire microphone circuit |
| 09/12/2007 | CN101036292A Apparatus and method for direct quadrature power amplifier modulation |
| 09/05/2007 | CN100336299C Power amplification for parametric loudspeakers |
| 09/04/2007 | US7265617 Class-D amplifier |
| 08/29/2007 | CN100334540C Sound card and method for limiting inputs to and outputs from sound card |
| 08/09/2007 | WO2006137872A3 Multi channel multiplexed inspection system and method |
| 08/07/2007 | US7254519 Multi channel multiplexed inspection system and method |
| 08/07/2007 | US7254244 Pop and click reduction using DAC power up and power down processing |
| 08/02/2007 | US20070177745 Tube amp simulator |
| 07/25/2007 | EP1810017A2 Multi channel multiplexed inspection system and method |
| 07/19/2007 | US20070165884 Information processing apparatus and sound control method therefor |
| 07/12/2007 | US20070160237 Amplifier apparatus and acoustic system |
| 07/04/2007 | EP1802280A2 Clopidogrel compositions |
| 06/21/2007 | WO2007070590A2 Multi-channel noise reduction system with direct instrument tracking |
| 06/21/2007 | US20070140513 Distortion compensation |
| 06/20/2007 | EP1798852A2 Distortion compensation |
| 06/14/2007 | US20070133825 Multi-channel noise reduction system with direct instrument tracking |
| 06/07/2007 | US20070127743 Electronic Apparatus Having Audio Output Units |
| 05/30/2007 | CN1973433A Amplifier circuit, semiconductor device and electronic apparatus |
| 05/24/2007 | US20070116303 Audio output driver and methods for use therewith |
| 05/23/2007 | EP1787386A1 An amplifier apparatus and method |
| 05/10/2007 | US20070104338 Amplifier Arrangement and Distributed Audio System |
| 05/09/2007 | CN1960175A Method and apparatus to control output power of a power amplifier and audio player having the same |
| 05/08/2007 | US7215788 Digital loudspeaker |
| 05/03/2007 | US20070098190 Method and apparatus to control output power of a digital power amplifier optimized to a headphone and a portable audio player having the same |
| 04/19/2007 | WO2006069325A3 Integrated booster amplifier |
| 03/20/2007 | US7194097 Audio control device |
| 03/01/2007 | US20070046369 High Sensitivity RFID TAG Integrated Circuits |
| 02/28/2007 | CN1302619C Amplifier for alternating signal overlapped on continuous signals and its amplifying method |
| 02/27/2007 | US7184561 Electronic apparatus having audio output units |
| 02/21/2007 | CN1918791A Amplifier and acoustic system |
| 02/07/2007 | CN1909364A BTL-type amplifier circuit |
| 02/01/2007 | WO2007014053A2 High sensitivity rfid tag integrated circuits |
| 02/01/2007 | WO2007013129A1 Sound receiver |
| 01/30/2007 | US7171011 Acoustic drive circuit |
| 01/25/2007 | WO2007009483A1 Microphone amplification arrangement and integrated circuit therefor |
| 01/25/2007 | US20070019828 Modular amplification system |
| 01/25/2007 | US20070019827 Digital amplifier for a personal computer |
| 01/23/2007 | US7167046 Class-D amplifier |
| 12/28/2006 | WO2006137872A2 Multi channel multiplexed inspection system and method |
| 12/28/2006 | WO2006078390A3 Portable multi-functional audio sound system and method therefor |
| 12/27/2006 | CN1885043A Digital control circuit and method for small phase-lock amplifier |
| 12/26/2006 | US7155020 Audio circuitry for dynamics reduction |
| 12/12/2006 | US7149316 Microcontroller having an on-chip high gain amplifier |
| 12/05/2006 | US7146015 Frequency threshold audio activity detector |
| 11/23/2006 | WO2006124491A2 Noise-shaping amplifier with waveform lock |
| 11/23/2006 | US20060261901 Noise-shaping amplifier with waveform lock |
| 11/16/2006 | WO2006078378A3 Method and topology to switch an output stage in a class ab audio amplifier for wireless applications |
| 10/26/2006 | WO2006044548A3 Clopidogrel compositions |
| 10/26/2006 | US20060239476 Biasing circuit for sound source amplifier |
| 10/26/2006 | US20060238241 Monolithic class d amplifier |
| 10/17/2006 | US7123730 Audio power amplifying apparatus and method |
| 10/17/2006 | US7123729 Dual use of an integrated circuit pin and the switching of signals at said pin |
| 09/28/2006 | US20060218327 Information handling system including detection of an audio input device |
| 09/28/2006 | US20060215855 Addressable amplified speaker assembly and method for addressing the same |