Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 8073179 | MEMS microphone package with RF insensitive MEMS microphone chip A micro-electro-mechanical-system microphone package includes a substrate, a micro-electro-mechanical-system microphone chip mounted on the substrate, and a cover attached to the substrate to cover the micro-electro-mechanical-system microphone chip. The cover is pr... | 12/06/2011 |
| 8068619 | Method and apparatus for noise suppression in a small array microphone system A small array microphone system includes an array microphone having a plurality of microphones and operative to provide a plurality of received signals, each microphone providing one received signal. A first voice activity detector (VAD) provides a first voice detec... | 11/29/2011 |
| 8064619 | Microphone and integrated circuit capible of echo cancellation The invention provides an integrated circuit of a microphone. In one embodiment, the integrated circuit receives a first signal converted from a sound and receives a reference signal with a digital format for echo cancellation. In one embodiment, the integrated circ... | 11/22/2011 |
| 8059838 | Interfacing circuit for a removable microphone The invention provides an interfacing circuit for a removable microphone. In one embodiment, the interfacing circuit comprises a jack for receiving the removable microphone and an integrated circuit comprising a biasing circuit, a buffer amplifier, and an insertion ... | 11/15/2011 |
| 8059837 | Audio processing method and system An audio processing system is provided. The audio processing system comprises a transducer, a gain stage, a capacitor network, and a preamplifier. The transducer transduces a sound signal to a voltage signal. The gain stage comprises an input coupled to the transduc... | 11/15/2011 |
| 7991168 | Serially connected microphones The invention provides a microphone. The microphone receives a first sound signal and at least one second electrical signal and outputs a third electrical signal. In one embodiment, the microphone comprises a transducer and a signal processor. The transducer convert... | 08/02/2011 |
| 7986800 | Device with acoustic guard A device includes a main body, a microphone module, and an acoustic guard. The microphone module is connected to the main body and comprises a first acoustic opening and a second acoustic opening, wherein the microphone module receives sound waves via both the first... | 07/26/2011 |
| 7986794 | Small array microphone apparatus and beam forming method thereof The invention provides a beam forming method for a small array microphone apparatus to generate cone beam pattern by processing a combined bi-directional beam pattern of two virtual bi-directional microphones formed through at least three omni-directional microphone... | 07/26/2011 |
| 7961895 | Audio interface device and method The invention provides an audio interface device and method to acquire audio signal from either an analog or digital microphone through a common connector. The audio interface comprises a connector, electrically connected with a microphone plugged thereinto, an anal... | 06/14/2011 |
| 7961869 | Hands-free voice communication apparatus with speakerphone and earpiece combo A hands-free voice communication apparatus includes a speakerphone and earpiece combo, a digital signal processing (DSP) module, and a communication module. The hands-free apparatus may be used as a speakerphone or an earpiece. The speakerphone and earpiece combo in... | 06/14/2011 |
| 7952436 | Phase lock loop circuit A phase lock loop (PLL) circuit is provided. A voltage controlled oscillator (VCO) generates an output clock signal based on a control voltage. A controller provides a first digital control word, a second digital control word and a loop factor. A frequency modifier ... | 05/31/2011 |
| 7945442 | Internet communication device and method for controlling noise thereof The invention provides an Internet communication device. The Internet communication device plays a remote audio signal received via a network and transmits an audio signal back to the remote party to complete the communication. The Internet communication device comp... | 05/17/2011 |
| 7848529 | Broadside small array microphone beamforming unit A broadside small array microphone beamforming unit comprises a first omni-directional microphone to generate a signal X1(t), a second omni-directional microphone to generate a signal X2(t), a first delay unit delaying the signal X1 | 12/07/2010 |
| 7856113 | Multi-microphone capsule A multi-microphone capsule includes a housing, a plurality of microphones disposed in the housing, and an acoustic seal also disposed in the housing, wherein the microphones include an omni-directional microphone, a uni-directional microphone, or combinations thereo... | 12/21/2010 |
| 7834699 | Audio compensation method and audio apparatus with class AB power amplifier An audio apparatus is provided, receiving a reference voltage and an input signal to generate an output signal. In the audio apparatus, a compensation circuit, generates a compensated reference voltage based on the input signal, the reference voltage and the output ... | 11/16/2010 |
| 7813498 | Full-duplex communication device and method of acoustic echo cancellation therein The invention provides a full-duplex communication device. In one embodiment, the full-duplex communication device comprises a first adaptive filter, a second adaptive filter, a channel decoupling module, and a frequency processing module. The first adaptive filter ... | 10/12/2010 |
| 7793015 | Method and apparatus for data rate control Methods and apparatus for rate control are provided. An isochronous circuit controls data transmission between a first device and a second device. The first device outputs a set of data packets to the isochronous circuit at a first data rate, and the second device p... | 09/07/2010 |
| 7764783 | Acoustic echo cancellation with oversampling Techniques for performing acoustic echo cancellation are described. An ADC oversamples an analog signal from a microphone and provides a near-end signal having a wider bandwidth than the bandwidth of a communication channel. A subband filter receives and filters the... | 07/27/2010 |
| 7711136 | Microphone array in housing receiving sound via guide tube An electronic device includes a housing, a plurality of microphones, and a plurality of guide tubes. The plurality of microphones are disposed in the housing. The plurality of guide tubes extend from the housing toward the plurality of microphones, whereby the plura... | 05/04/2010 |
| 7706549 | Broadside small array microphone beamforming apparatus A broadside small array microphone beamforming apparatus comprises first and second omni-directional microphones, a microphone calibration unit, and a directional microphone forming unit. The first and second omni-directional microphones respectively convert voice f... | 04/27/2010 |
| 7689417 | Method, system and apparatus for improved voice recognition An improved voice recognition system in which a Voice Keyword Table is generated and downloaded from a set-up device to a voice recognition device. The VKT includes visual form data, spoken form data, phonetic format data, and an entry corresponding to a keyword, an... | 03/30/2010 |
| 7672445 | Method and system for nonlinear echo suppression Techniques for suppressing large echo due to nonlinearity, instable adaptive filter, and so on. An echo cancellation system includes an echo canceller unit, a nonlinear echo detection unit, and a nonlinear echo suppression unit. The echo canceller unit (e.g., an ada... | 03/02/2010 |
| 7664284 | Microphone array in housing An electronic device includes a circuit board, a first microphone module, and a second microphone module. The first microphone module includes a first omnidirectional microphone connected to the circuit board, a first boot also connected to the circuit board, and a ... | 02/16/2010 |
| 7657025 | Microphone module and method for fabricating the same A microphone module. The module comprises a carrier having a first side and an opposing second side and comprising a through hole. A microphone is disposed on the first side of the carrier and corresponding to the through hole. A processing chip is disposed on the f... | 02/02/2010 |
| 7623672 | Microphone array in housing receiving sound via guide tube An electronic device includes a housing, a plurality of microphones, and a plurality of guide tubes. The plurality of microphones are disposed in the housing. The plurality of guide tubes extend from the housing toward the plurality of microphones, whereby the plura... | 11/24/2009 |
| 7619551 | Audio codec, digital device and voice processing method An audio codec is provided, comprising an analog to digital converter (ADC) operable to receive an analog input signal for producing a first digital signal, and a first decimator down samples the first digital signal to generate a first intermediate signal. A second... | 11/17/2009 |
| 7602923 | Electro acoustic system built-in test and calibration method An electro acoustic system built-in test and calibration method utilizes a built-in self-test module to send a test signal through a first circuit device to an audio transmitter, causing the audio transmitter to output a test signal, for enabling the test signal to ... | 10/13/2009 |
| 7587056 | Small array microphone apparatus and noise suppression methods thereof The small array microphone apparatus comprises first and second omni-directional microphones, a microphone calibration unit and a directional microphone forming unit. The first and second omni-directional microphones respectively convert sound from a desired near-en... | 09/08/2009 |
| 7570253 | Pen-type computer A pen-type computer includes a pen barrel, a sensor, a primary processor, and a storage device. The pen barrel has a writing tip. The sensor is disposed in the pen barrel, sensing movement of the writing tip and generating a tracking signal corresponding to the move... | 08/04/2009 |
| 7558396 | Microphone module at corner or edge of electronic device An electronic device includes a body and a microphone module. The body includes a plurality of corners and a plurality of edges meeting at the corners. The microphone module is provided with a plurality of acoustic openings and disposed at the corners and/or the edg... | 07/07/2009 |
| 7415294 | Hands-free voice communication apparatus with integrated speakerphone and earpiece A hands-free voice communication apparatus with integrated speakerphone and earpiece is described. The speakerphone includes a loudspeaker and zero, one or multiple microphones. The earpiece includes a small loudspeaker, one or more microphones, a wireless module, a... | 08/19/2008 |
| 7403611 | Small size hands-free speakerphone apparatus A small-footprint hands-free speakerphone apparatus includes a loudspeaker, at least one main microphone, at least one reference microphone, and openings for receiving sound. The loudspeaker is disposed within a speaker chamber. Each microphone is mounted in a micro... | 07/22/2008 |
| 7385540 | Method for mixing signals with an analog-to-digital converter The invention provides a method for mixing signals with an analog-to-digital converter. The analog-to-digital converter receives a plurality of analog signals. First, the plurality of analog signals are respectively converted to a plurality of first datastreams with... | 06/10/2008 |
| 7376847 | Power distribution control circuit for multi-power domain electronic circuits Methods and apparatus are disclosed for controlling power distribution during transitory power-up period of multi-domain electronic circuits that are supplied by multiple power supplies. The power distribution is controlled by self-regulating power control circuits ... | 05/20/2008 |
| 7333605 | Acoustic echo cancellation with adaptive step size and stability control An acoustic echo canceller having an adaptive filter, a step size control unit, and (optionally) a stability control unit. The adaptive filter derives an estimate of the echo in a near-end signal using a digital filter (e.g., a FIR filter) and further cancels the ec... | 02/19/2008 |
| D559232 | Wireless headset | 01/08/2008 |
| 7295141 | Method for mixing signals with an analog-to-digital converter The invention provides a method for mixing signals with an analog-to-digital converter. The analog-to-digital converter receives a plurality of analog signals. First, the plurality of analog signals are respectively converted to a plurality of first datastreams with... | 11/13/2007 |
| 7268718 | Capacitor-based digital-to-analog converter for low voltage applications A digital-to-analog converter (DAC) compatible with CMOS technology and operable in low voltage applications. An input capacitor stores a charge sample according to a digital input signal and a previous output analog signal. An analog output circuit has a feedback c... | 09/11/2007 |
| 7265702 | Method for converting an analog signal to multiple different phase outputs utilizing an analog-to-digital converter A method for converting an analog signal to multiple different phase outputs with an analog-to-digital converter is provided. First, the analog signal is converted to a high-frequency datastream with a delta-sigma modulator. A plurality of low-frequency datastreams ... | 09/04/2007 |
| 7209404 | Low power memory sub-system architecture Disclosed methods and apparatus provide embedded memory architectures that lower the overall operational power consumption of memory arrays without sacrificing memory access speed. Because in large memory arrays the leakage current is a considerable portion of the o... | 04/24/2007 |
