| Patents for H03F 99 - Subject matter not provided for in other groups of this subclass (812) |
|---|
| 05/17/2012 | US20120121109 Analog-to-digital Converting Method and Functional Device Using the Same |
| 05/08/2012 | US8175296 Articulated amplifier |
| 05/03/2012 | US20120106760 Audio amp with spurious wave noise reduction circuit |
| 04/26/2012 | US20120099743 Class d amplification device |
| 04/26/2012 | US20120099742 Audio jack with esd protection |
| 04/24/2012 | US8165333 Modular speaker system |
| 04/24/2012 | US8165322 Circuit for processing sound signals |
| 04/19/2012 | WO2012048432A1 Device for cooling high power broadcast transmitters |
| 04/19/2012 | US20120092377 Media tablet dock integration with room audio system |
| 04/12/2012 | US20120087518 Full Range Planar Magnetic Microphone and Arrays Thereof |
| 04/10/2012 | US8155353 Device and method for driving speaker |
| 04/10/2012 | US8155352 Serializer for multiple applications |
| 04/10/2012 | US8155351 Sound signal output device and program for controlling sound output |
| 03/29/2012 | US20120076326 All-in-one computer audio system |
| 03/27/2012 | US8144880 Audio amplifier capable of performing self-oscillation |
| 03/22/2012 | US20120068764 Signal amplifier, bridge connection signal amplifier signal output device, latch-up prevention method, and program storage medium |
| 03/20/2012 | US8139792 Amplifier circuits, methods of starting and stopping amplifier circuits |
| 03/20/2012 | US8139782 Modular amplification system |
| 03/06/2012 | US8130982 Signal amplifying apparatus, amplification system, and signal amplification method |
| 03/06/2012 | US8130981 Sound card having feedback calibration loop |
| 02/28/2012 | US8126158 Reducing sound pressure of noise |
| 02/23/2012 | US20120045076 Electronic circuit for driving a switching amplifier |
| 02/22/2012 | CN101488730B 放大器、音频系统以及输入信号的放大方法 An amplifier amplifying method, the audio system and the input signals |
| 02/09/2012 | US20120033834 Apparatus With Directivity Pattern |
| 02/07/2012 | US8111845 System having a pulse width modulation device |
| 02/07/2012 | US8111844 Semiconductor integrated circuit and condenser microphone |
| 01/17/2012 | US8098849 Low frequency equalization for loudspeaker system |
| 01/12/2012 | US20120008796 Distortion compensation |
| 01/10/2012 | US8094839 Microelectromechanical system (MEMS) device with senstivity trimming circuit and trimming process |
| 01/05/2012 | US20120002821 Grounding switch method and apparatus |
| 01/05/2012 | US20120002819 Audio driver system and method |
| 01/03/2012 | CA2540393C Addressable amplified speaker assembly and method for addressing the same |
| 12/27/2011 | US8085954 Microphone amplification arrangement and integrated circuit therefor |
| 12/22/2011 | US20110311076 Method for adjusting the maximum output power of a valve power amplifier stage for an audio amplifier, and corresponding valve power amplifier stage |
| 12/22/2011 | US20110308377 Multi-Channel Noise Reduction System with Direct Instrument Tracking |
| 12/15/2011 | US20110305354 Systems and methods for controlling hda system capabilities |
| 12/15/2011 | US20110305353 Audio amplifier with closed-loop power |
| 12/08/2011 | US20110299704 Frequency-tracked synthesizer employing selective harmonic amplification and/or frequency scaling |
| 12/08/2011 | US20110299696 Method and system for controlling amplifiers |
| 12/06/2011 | US8073161 Audio apparatus |
| 12/01/2011 | US20110293105 Earpiece and a method for playing a stereo and a mono signal |
| 11/29/2011 | US8068622 Method and apparatus for controlling a selectable voltage audio power output stage |
| 11/24/2011 | US20110286611 Digital amplifier |
| 11/22/2011 | US8064622 Self-biased amplifier device for an electrecret microphone |
| 11/22/2011 | US8064619 Microphone and integrated circuit capible of echo cancellation |
| 11/15/2011 | US8059838 Interfacing circuit for a removable microphone |
| 11/15/2011 | US8059837 Audio processing method and system |
| 11/10/2011 | US20110274296 Ear Tip Method and Apparatus |
| 11/10/2011 | US20110274295 Negative-voltage charge pump circuit |
| 11/08/2011 | US8055008 Sound amplifying guitar stand |
| 11/08/2011 | US8054995 System, method and apparatus for adjusting an output of a transducer |
| 11/08/2011 | CA2580275C Multi channel multiplexed inspection system and method |
| 10/27/2011 | US20110261978 Electronic Apparatus |
| 10/25/2011 | US8045730 Methods and systems for reducing acoustic echoes in communication systems |
| 10/13/2011 | US20110249832 Speaker device |
| 10/11/2011 | US8036402 Distortion compensation |
| 10/06/2011 | US20110243352 Concept, method and apparatus of improved distortion switched-mode amplifier |
| 10/06/2011 | US20110243340 Parameter Setting Method and Audio Apparatus |
| 10/04/2011 | US8031888 Electronic apparatus having audio output units |
| 09/29/2011 | US20110235827 Amplifier circuit and methods of operation thereof |
| 09/29/2011 | US20110235826 Procedure and device for linearizing the characteristic curve of a vibration signal transducer such as a microphone |
| 09/27/2011 | US8027490 Audio control method and audio processing system |
| 09/15/2011 | US20110222712 Audio output driver for reducing electromagnetic interference and improving audio channel performance |
| 09/14/2011 | EP1912466B1 Sound receiver |
| 09/08/2011 | US20110216929 Apparatus and method for outputting sound in mobile terminal |
| 09/08/2011 | US20110216920 Speaker drive integrated circuit |
| 09/06/2011 | US8014544 Computer installed stereo PA amplifier card |
| 09/06/2011 | US8014539 Method and apparatus to control output power of a digital power amplifier optimized to a headphone and a portable audio player having the same |
| 08/04/2011 | US20110188675 Electronic apparatus |
| 08/02/2011 | US7991172 Half-voltage headphone driver circuit |
| 07/21/2011 | US20110176694 Multi-port combiner for an audio amplifier |
| 07/21/2011 | US20110176693 Electronic device and integrated circuit comprising a gain control module and method therefor |
| 07/19/2011 | US7983429 Speaker system utilizing input from a transducer in proximity to a separate speaker |
| 07/14/2011 | US20110170717 Method and apparatus for amplifying audio signal |
| 07/14/2011 | US20110170716 Methods And Apparatus For Variable Solid State-To-Tube Rectification In An Amplifier |
| 07/07/2011 | US20110164766 Ribbon loudspeaker module and amplifier therefore |
| 07/07/2011 | US20110164765 Product or packaging system with integrated electronics |
| 07/07/2011 | US20110164764 Diaphragm for speaker, speaker using the diaphragm, electronic device using the speaker, and speaker-mounted device |
| 07/06/2011 | EP2052456B1 Integrator and error amplifier |
| 06/30/2011 | US20110158437 Audio amplifier having load adjustment and method for the load adjustment of the audio amplifier |
| 06/30/2011 | US20110158436 Electronic apparatus |
| 06/30/2011 | US20110158435 Audio signal amplifier circuit |
| 06/30/2011 | US20110158433 Speaker system and speaker driving circuit |
| 06/28/2011 | US7970154 Condenser microphone |
| 06/23/2011 | US20110150245 Capacitive load driving amplifier |
| 06/23/2011 | US20110150244 Audio Signal Amplifier for Karaoke Player |
| 06/23/2011 | US20110150237 Signal processing device and signal processing method |
| 06/23/2011 | US20110149170 Method and apparatus for controlling an electronic system |
| 06/16/2011 | US20110142262 Audio processing apparatus |
| 06/09/2011 | US20110135116 Method and Apparaus for Biasing an Amplifier |
| 06/07/2011 | US7957546 Multi-channel noise reduction system with direct instrument tracking |
| 06/02/2011 | US20110129104 Electronic apparatus |
| 06/02/2011 | US20110129103 Electronic apparatus |
| 05/26/2011 | US20110123049 Systems and Methods for Offset Cancellation Method for DC-Coupled Audio Drivers |
| 05/26/2011 | US20110123048 Class g audio amplifiers and associated methods of operation |
| 05/19/2011 | US20110116658 Fine natural fiber and speaker diaphragm coated with fine natural fiber |
| 05/12/2011 | US20110110540 Shelf |
| 05/12/2011 | US20110110539 Self-oscillating audio amplifier and method for restraining the improved self-oscillating audio amplifier |
| 05/12/2011 | US20110110538 Power amplifier and method for restraining power of improved power amplifier |
| 05/12/2011 | US20110110537 Light-Powered Loudspeaker System |