Class / Patent application number | Description | Number of patent applications / Date published |
381114000 | With piezoelectric microphone | 17 |
20080285776 | 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 analog readout circuit, acquiring an analog audio signal from an analog microphone, a digital readout circuit, acquiring a digital audio signal from a digital microphone, and a decision circuit, selectively connecting the analog or digital readout circuit to the connector to acquire the analog or digital audio signal respectively according to whether the microphone plugged into the connector is analog or digital. | 11-20-2008 |
20100254547 | PIEZOELECTRIC MEMS MICROPHONE - A piezoelectric MEMS microphone comprising a multi-layer sensor that includes at least one piezoelectric layer between two electrode layers, with the sensor being dimensioned such that it provides a near maximized ratio of output energy to sensor area, as determined by an optimization parameter that accounts for input pressure, bandwidth, and characteristics of the piezoelectric and electrode materials. The sensor can be formed from single or stacked cantilevered beams separated from each other by a small gap, or can be a stress-relieved diaphragm that is formed by deposition onto a silicon substrate, with the diaphragm then being stress relieved by substantial detachment of the diaphragm from the substrate, and then followed by reattachment of the now stress relieved diaphragm. | 10-07-2010 |
20110182443 | ELECTRONIC DEVICE HAVING A CONTACT MICROPHONE - Embodiments of the present invention disclose a contact microphone for an electronic device. According to one embodiment, the electronic device includes a display lens having a front side and a backside opposite the front side, with the display lens being formed around the perimeter of a display unit. Furthermore, a contact microphone is coupled to a backside of the display lens and configured to convert acoustic signals received on the front side of the display lens. | 07-28-2011 |
20120213388 | Unidirectional Mechanical Amplification in a Microphone - A unidirectional active microphone that includes a diaphragm, coil, and piezoelectric component. An electrical circuit provides amplification to the coil. The piezoelectric component produces unidirectional coupling between coil and diaphragm. The microphone is unidirectional in that the amplification is provided solely to the coil and is not transferred to the diaphragm. | 08-23-2012 |
20120224723 | Condenser Microphone - A condenser microphone includes a condenser microphone unit and a piezoelectric element. The piezoelectric element is disposed so as to generate piezoelectric signals in response to vibration causing the unit to generate vibratory noise signals. The piezoelectric signals are inputted through a low-pass filter and a level adjuster circuit to the unit to drive a diaphragm of the unit. The vibratory noise signals generated by the vibration in the unit are canceled with the piezoelectric signals generated by the piezoelectric element. | 09-06-2012 |
20140023210 | TOUCH INPUT SURFACE MICROPHONE - Processing an audio signal is disclosed. The audio signal is received from a sensor coupled to a touch input medium. An indication of an event where the touch input medium has been contacted at a location on the touch input medium is received. The event has been captured as an audio signal component of the received audio signal. At least a portion of the audio signal component is reduced from the audio signal. | 01-23-2014 |
20140270262 | ADJUSTABLE BIASING CIRCUITS FOR MEMS CAPACITIVE MICROPHONES - An adjustable charge pump system. The system includes a voltage regulator, a clock circuit, a voltage adjustment circuit, and a charge pump. The voltage regulator is configured to receive an input voltage and output a regulated voltage. The clock circuit is coupled to the voltage regulator and receives the regulated voltage. The voltage adjustment circuit is coupled to the voltage regulator and is configured to receive the regulated voltage and to output a driver voltage. The charge pump includes a plurality of stages. The output of the adjustable charge pump system is adjusted by disabling one or more stages of the first stage and the plurality of subsequent stages. | 09-18-2014 |
20150043755 | VAD DETECTION MICROPHONE AND METHOD OF OPERATING THE SAME - A microphone includes a microelectromechanical system (MEMS) circuit and an integrated circuit. The MEMS circuit is configured to convert a voice signal into an electrical signal, and the integrated circuit is coupled to the MEMS circuit and is configured to receive the electrical signal. The integrated circuit and the MEMS circuit receive a clock signal from an external host. The clock signal is effective to cause the MEMS circuit and integrated circuit to operate in full system operation mode during a first time period and in a voice activity mode of operation during a second time period. The voice activity mode has a first power consumption and the full system operation mode has a second power consumption. The first power consumption is less than the second power consumption. The integrated circuit is configured to generate an interrupt upon the detection of voice activity, and send the interrupt to the host. | 02-12-2015 |
20150078587 | Adjustable Ventilation Openings in MEMS Structures - A MEMS structure and a method for operation a MEMS structure are disclosed. In accordance with an embodiment of the present invention, a MEMS structure comprises a substrate, a backplate, and a membrane comprising a first region and a second region, wherein the first region is configured to sense a signal and the second region is configured to adjust a threshold frequency from a first value to a second value, and wherein the backplate and the membrane are mechanically connected to the substrate. | 03-19-2015 |
20150110295 | System and Method for Automatic Calibration of a Transducer - In accordance with an embodiment, an interface circuit includes a variable voltage bias generator coupled to a transducer, and a measurement circuit coupled to an output of the transducer. The measurement circuit is configured to measure an output amplitude of the transducer. The interface circuit further includes a calibration controller coupled to the bias generator and the measurement circuit, and is configured to set a sensitivity of the transducer and interface circuit during an auto-calibration sequence. | 04-23-2015 |
20150110296 | System and Method for Transducer Biasing and Shock Protection - In accordance with an embodiment, an interface circuit includes an amplifier configured to be coupled to a transducer, a first bypass circuit coupled to a first voltage reference and the amplifier, a second bypass circuit coupled to the first voltage reference and the amplifier, and a control circuit coupled to the second bypass circuit. The first bypass circuit conducts a current when an input signal amplitude greater than a first threshold is applied to the transducer and the control circuit causes the second bypass circuit to conduct a current for a first time period after the first bypass circuit conducts a current. | 04-23-2015 |
20150131812 | MEMS Microphone Assembly and Method of Operating the MEMS Microphone Assembly - A MEMS microphone assembly includes a MEMS transducer element having a back plate and a diaphragm displaceable relative to the back plate. A bias voltage generator is adapted to provide a DC bias voltage applicable between the diaphragm and the back plate. An amplifier receives an electrical signal from the MEMS transducer element and provides an output signal. The amplifier is adapted to amplify the electrical signal from the MEMS transducer element according to an amplifier gain setting. A processor is adapted to carry out a calibration routine at power-on of the microphone assembly determining information regarding the DC bias voltage and/or the amplifier gain setting. | 05-14-2015 |
20150146887 | MICROPHONE ON PRINTED CIRCUIT BOARD (PCB) - A MEMS device includes a MEM-CMOS module having a CMOS chip and a MEMS chip. The MEMS chip includes a port exposed to the environment. The MEMS device further includes a printed circuit board (PCB) with an aperture, wherein the MEMS-CMOS module is directly mounted on the PCB. | 05-28-2015 |
20150146888 | MEMS MICROPHONE PACKAGE AND METHOD OF MANUFACTURING THE SAME - There is provided a micro electro mechanical system (MEMS) microphone package including: an MEMS microphone chip having an internal space formed therein; a substrate having the MEMS microphone chip mounted thereon; an ASIC chip disposed in the internal space formed within the MEMS microphone chip; and a case bonded to the substrate and having an internal space formed therein in order to accommodate the MEMS microphone chip. | 05-28-2015 |
20150326967 | ELECTRONIC DEVICE - A cover panel is located on a front surface of an electronic device. A piezoelectric vibration element is provided on an inner main surface of the cover panel. A drive section causes the piezoelectric vibration element to vibrate based on a sound signal. The electronic device has a microphone hole located in a part other than the cover panel. | 11-12-2015 |
20160087015 | ORGANIC LIGHT EMITTING DISPLAY DEVICES AND METHODS OF MANUFACTURING ORGANIC LIGHT EMITTING DISPLAY DEVICES - An organic light emitting display device and a method of manufacturing an organic light emitting display device are disclosed. The organic light emitting display device includes a first substrate, on which a display region and a non-display region surrounding the display region are defined, a second substrate disposed opposite to the first substrate, an organic light emitting element disposed in the display region between the first substrate and the second substrate, a third substrate disposed opposite to the second substrate, and a microphone disposed between the second substrate and the third substrate. | 03-24-2016 |
20160134973 | Secure Audio Sensor - Providing security features in an audio sensor is presented herein. A micro-electro-mechanical system (MEMS) microphone can include an acoustic membrane that converts an acoustic signal into an electrical signal; an electronic amplifier that increases an amplitude of the electrical signal to generate an amplified signal; and switch(es) configured to prevent propagation of a direct current (DC) voltage source to the MEMS microphone; prevent propagation of the DC voltage source to the electronic amplifier; prevent propagation of the electrical signal to the electronic amplifier; and/or prevent propagation of the amplified signal to an external device. | 05-12-2016 |