| Patents for H03F 99 - Subject matter not provided for in other groups of this subclass (812) |
|---|
| 05/11/2011 | EP2320673A1 Sound receiver |
| 05/05/2011 | US20110103619 Amplifier circuit and methods of operation thereof |
| 04/28/2011 | US20110096945 Microphone unit with internal A/D converter |
| 04/28/2011 | US20110096944 High perceived audio quality class d amplifier |
| 04/28/2011 | US20110096943 Audio Console System |
| 04/20/2011 | EP2312750A1 A method for transmission of signals from a transmitting device to a receiving device comprising an amplifying unit, a transmitting device and a receiving device therefor |
| 04/20/2011 | EP2312747A2 Distortion compensation |
| 04/19/2011 | US7929718 Systems and methods for switching and mixing signals in a multi-channel amplifier |
| 04/12/2011 | US7925031 Audio system with feedback detection means |
| 04/07/2011 | US20110081028 Addressable amplified speaker assembly and method for addressing the same |
| 04/06/2011 | CN101299548B Power control apparatus, speaker apparatus and power control method |
| 03/24/2011 | US20110069849 Portable Amplifier |
| 03/22/2011 | US7912233 Speaker system for musical instruments |
| 03/17/2011 | US20110064230 Phase layering apparatus and method for a complete audio signal |
| 03/10/2011 | US20110058692 Audio output devices |
| 03/10/2011 | US20110058688 Audio processing apparatus and method |
| 03/08/2011 | US7903823 Apparatus and method for effecting sound stage expansion |
| 03/03/2011 | US20110055877 Amplifier circuit |
| 03/03/2011 | US20110051937 Beam forming in spatialized audio sound systems using distributed array filters |
| 02/24/2011 | US20110044476 System to generate electrical signals for a loudspeaker |
| 02/22/2011 | US7894616 Condenser microphone employing wide band stop filter and having improved resistance to electrostatic discharge |
| 02/22/2011 | US7894615 Attenuator device for amplified musical instruments |
| 02/15/2011 | US7889882 Selectable diaphragm condenser microphone |
| 02/15/2011 | US7889875 Class-D driving method for stereo load |
| 02/10/2011 | US20110033056 Noise cancellation for microphone-speaker combinations using combined speaker amplifier and reference sensing |
| 02/03/2011 | US20110026739 High level capable audio amplification circuit |
| 02/02/2011 | CN1960175B Method and apparatus to control output power of a power amplifier and audio player having the same |
| 01/27/2011 | US20110019843 High Efficiency Audio Amplifier and Method thereof |
| 01/25/2011 | US7876152 High-impedance level-shifting amplifier capable of handling input signals with a voltage magnitude that exceeds a supply voltage |
| 01/13/2011 | WO2010138515A3 Dynamic contoured-sound/subwoofer-synthesis audio system |
| 01/13/2011 | US20110009090 Cellular phone with boundary alarm |
| 01/13/2011 | US20110007909 Class h amplifier |
| 01/13/2011 | US20110005466 Animal travel carrier |
| 01/11/2011 | US7868693 Class-D amplifier |
| 01/06/2011 | US20110001204 Transimpedance amplifier having a shared input |
| 12/30/2010 | US20100329484 Audio Amplifier Attachable to Speaker System by Way of Magnetic Coupler and Method Therefor |
| 12/29/2010 | CN101933084A Electronic bass register musical instrument tube preamplifier |
| 12/23/2010 | US20100322441 Notebook power supply with integrated subwoofer |
| 12/23/2010 | US20100322440 Audio processing circuit and preamplifier circuit |
| 12/23/2010 | US20100321569 Apparatus and method for converting operation mode in image display compound device |
| 12/16/2010 | US20100316234 Projector and audio output method |
| 12/09/2010 | US20100310097 Apparatus and method for outputing audio signal in portable terminal |
| 12/08/2010 | CN1759633B Transducer assembly with modifiable buffer circuit and method for adjusting thereof |
| 12/02/2010 | WO2010138515A2 Dynamic contoured-sound/subwoofer-synthesis audio system |
| 11/30/2010 | US7844233 Passive amplification of signals |
| 11/30/2010 | US7843271 Audio amplifier and methods for use therewith |
| 11/25/2010 | US20100294587 Tetrahedral Loudspeaker |
| 11/18/2010 | US20100290646 Switching amplifier |
| 11/11/2010 | US20100284151 Sealed Power Supply and Platform for Military Radio |
| 11/11/2010 | US20100283544 Harmonic processing circuit and amplifying circuit using the same |
| 11/11/2010 | US20100282198 Corona ignition with self-tuning power amplifier |
| 11/02/2010 | US7826628 Addressable amplified speaker assembly and method for addressing the same |
| 10/28/2010 | US20100272294 Two-channel amplifier with common signal |
| 10/28/2010 | US20100272293 Amplifier circuit audio circuit and electronic device |
| 10/19/2010 | US7817807 Audio output driver and methods for use therewith |
| 10/14/2010 | US20100260356 Band-splitting time compensation signal processing device |
| 10/12/2010 | US7813515 Multi-channel power amplifier with channels independently self-configuring to a bridge or single-ended output, particularly for audio applications |
| 10/07/2010 | US20100254549 Amplifier circuit of capacitor microphone |
| 09/30/2010 | US20100246859 Biasing circuit for a microelectromechanical acoustic transducer and related biasing method |
| 09/30/2010 | US20100246858 Amplifier circuit |
| 09/30/2010 | US20100246857 Electronic device |
| 09/28/2010 | US7804966 Audio amplifier attachable to speaker system by way of magnetic coupler and method therefor |
| 09/16/2010 | US20100232628 Circuits and Methods for Reducing Pop Noise in Class D Amplifiers |
| 09/09/2010 | US20100226513 Audio circuit |
| 09/02/2010 | US20100220874 Input selector |
| 08/10/2010 | US7773693 Apparatus and method for direct quadrature power amplifier modulation |
| 08/05/2010 | US20100195849 Thermoacoustic device |
| 08/05/2010 | US20100195848 Audio processing apparatus |
| 07/29/2010 | US20100189284 Vibration device and acoustic system |
| 07/22/2010 | US20100183170 Dock without a power source for digital devices |
| 07/22/2010 | US20100180756 Portable Multi-Functional Audio Sound System and Method Therefor |
| 06/24/2010 | US20100158278 Power Management Controller for Drivers |
| 06/15/2010 | US7737788 Cascode gain boosting system and method for a transmitter |
| 05/20/2010 | US20100124334 Amplification circuit and audio output equipment |
| 05/12/2010 | CN1909364B BTL-type amplifier circuit |
| 05/06/2010 | US20100111331 Class d amplifier |
| 05/05/2010 | CN101036292B Base station, mobile station and radio frequency emitting machien used in wireless network |
| 05/04/2010 | US7711128 System, circuit, and amplifier for reducing pop sound |
| 04/22/2010 | US20100098268 High-voltage output amplifier for audio systems |
| 04/20/2010 | US7702120 Self-amplified loudspeakers with switching amplifier technology |
| 04/20/2010 | US7702119 Multi-input gain control circuit |
| 04/15/2010 | US20100092010 Method and electronic device for driving a capacitance electro-acoustic transducer |
| 04/15/2010 | US20100092009 Audio output device |
| 03/25/2010 | US20100074457 Sound reproducing system with superimposed digital signal |
| 03/23/2010 | CA2435310C High efficiency wideband linear wireless power amplifier |
| 03/04/2010 | US20100054500 Audio device and audio input/output method |
| 03/04/2010 | US20100052783 Class-d amplifier |
| 03/02/2010 | US7672461 Method and apparatus for creating a virtual third channel in a two-channel amplifier |
| 03/02/2010 | US7671679 Semiconductor integrated circuit and amplifier for suppressing pop sound while minimizing voltage transition settling time |
| 02/18/2010 | US20100042237 Mobile communication device and audio signal adjusting method thereof |
| 02/02/2010 | US7657041 Laser audio preamplifier, volume control, and multiplexer |
| 01/27/2010 | EP2147427A1 Digital audio horn |
| 01/21/2010 | US20100014694 Audio Amplifier |
| 01/21/2010 | US20100013643 System, Converter and Method for Wide Area Distribution of Supervised Emergency Audio |
| 01/13/2010 | CN101627639A Audio system with synthesized positive impedance |
| 01/05/2010 | US7643642 Method and system for operating accessory controls |
| 12/24/2009 | US20090316933 Miniature Speaker Device and Television Set |
| 12/24/2009 | US20090316926 Audio device |
| 12/22/2009 | US7636446 State machine enabling auto-recovery of short-circuited class D audio amplifiers |
| 12/10/2009 | US20090304202 Sound amplification system |