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11.发明申请公开(公告)号：US20160105750A1
公开(公告)日：2016-04-14
申请号：US14975155
申请日：2015-12-18
Applicant: INVENSENSE, INC.
Inventor： Baris Cagdaser , Fariborz Assaderaghi
CPC classification number: H04R3/00 , G06F13/38 , H04R19/005 , H04R2201/003 , H04R2420/09
Abstract: Signal processing for an acoustic sensor bi-directional communication channel is presented herein. The acoustic sensor can comprise a micro-electro-mechanical system (MEMS) transducer configured to generate, based on an acoustic pressure, an audio output; and a bi-directional communication component configured to send and/or receive data that has been superimposed on the audio output using common mode signaling, time division multiplexing, or frequency separation. In an example, a signal processing component is configured to send the audio output directed to an external device utilizing differential mode signaling between respective pins of the acoustic sensor; and send the data utilizing the common mode signaling comprising a sum of voltages of the respective pins. In other examples, the signal processing component is configured to send and/or receive the data, and send the audio output, during different time periods; or send the data based on a frequency range outside an audio band.
Abstract translation: 本文介绍了一种声传感器双向通信信道的信号处理。 声学传感器可以包括微电子机械系统（MEMS）传感器，其被配置为基于声压产生音频输出; 以及双向通信部件，被配置为使用共模信令，时分复用或频率分离来发送和/或接收叠加在音频输出上的数据。 在一个示例中，信号处理组件被配置为使用声学传感器的各个引脚之间的差分模式信号发送定向到外部设备的音频输出; 并且使用包括相应引脚的电压之和的共模信号发送数据。 在其他示例中，信号处理组件被配置为在不同时间段期间发送和/或接收数据并发送音频输出; 或者基于音频频带外的频率范围发送数据。
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公开(公告)号：US08723600B1
公开(公告)日：2014-05-13
申请号：US13775057
申请日：2013-02-22
Applicant: Invensense, Inc.
Inventor： Baris Cagdaser , Du Chen
IPC: H03F3/45
Abstract: A circuit utilizes a MOS device in a triode mode of operation and includes a biasing circuit and a MOS device. The MOS device has a drain, a source, and a gate terminal, and is coupled to the biasing circuit. The source terminal, drain terminal, and gate terminal each has a potential and the drain and the source terminals have a resistance. The biasing circuit couples the drain and source terminals of the MOS device to the gate terminal of the MOS device. The biasing circuit couples a DC potential to the gate terminal to adjust the resistance between the source and drain terminals of the MOS device. The resistance between the source and drain terminals is a non-linear function of voltage potentials at the source and drain terminals. The biasing circuit reduces the non-linearity of the resistance between the drain and source terminals by modulating the potential at the gate terminal by a combination of source and drain terminal potentials.
Abstract translation: 电路采用三极管工作模式的MOS器件，并包括偏置电路和MOS器件。 MOS器件具有漏极，源极和栅极端子，并且耦合到偏置电路。 源极端子，漏极端子和栅极端子各自具有电位，漏极和源极端子具有电阻。 偏置电路将MOS器件的漏极和源极端子耦合到MOS器件的栅极端子。 偏置电路将DC电位耦合到栅极端子以调节MOS器件的源极和漏极端子之间的电阻。 源极和漏极端子之间的电阻是源极和漏极端子处的电压电位的非线性函数。 偏置电路通过源极和漏极端子电位的组合调制栅极端子处的电位来降低漏极和源极端之间的电阻的非线性。
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公开(公告)号：US20180340901A1
公开(公告)日：2018-11-29
申请号：US16038499
申请日：2018-07-18
Applicant: INVENSENSE, INC.
Inventor： Fang Liu , Martin Lim , Baris Cagdaser
IPC: G01N27/04 , G01N27/414 , G01K7/16 , G01N27/12
Abstract: The present invention relates to low power, low cost, and compact gas sensors and methods for making the same. In one embodiment, the gas sensor includes a heating element embedded in a suspended structure overlying a substrate. The heating element is configured to generate an amount of heat to bring the chemical sensing element to an operating temperature. The chemical sensing element is thermally coupled to the heating element. The chemical sensing element is also exposed to an environment that contains the gas to be measured. In one embodiment, the chemical sensing element comprises a metal oxide compound having an electrical resistance based on the concentration of a gas in the environment and the operating temperature of the chemical sensing element. In this embodiment, the operating temperature of the chemical sensing element is greater than room temperature and determined by the amount of heat generated by the heating element.
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公开(公告)号：US10001387B2
公开(公告)日：2018-06-19
申请号：US15058084
申请日：2016-03-01
Applicant: Invensense, Inc.
Inventor： Baris Cagdaser , Derek Shaeffer , Joseph Seeger
IPC: G01C25/00 , G01R27/26 , G01C19/5726 , G01D5/24
CPC classification number: G01C25/00 , G01C19/5726 , G01D5/24 , G01R27/2605
Abstract: A MEMS capacitive sensing interface includes a sense capacitor having a first terminal and a second terminal, and having associated therewith a first electrostatic force. Further included in the MEMS capacitive sensing interface is a feedback capacitor having a third terminal and a fourth terminal, the feedback capacitor having associated therewith a second electrostatic force. The second and the fourth terminals are coupled to a common mass, and a net electrostatic force includes the first and second electrostatic forces acting on the common mass. Further, a capacitance measurement circuit measures the sense capacitance and couples the first terminal and the third terminal. The capacitance measurement circuit, the sense capacitor, and the feedback capacitor define a feedback loop that substantially eliminates dependence of the net electrostatic force on a position of the common mass.
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公开(公告)号：US09718671B2
公开(公告)日：2017-08-01
申请号：US14642693
申请日：2015-03-09
Applicant: INVENSENSE, INC.
Inventor： Sushil Bharatan , Baris Cagdaser
CPC classification number: B81B3/007 , B81B2203/0127 , B81B2203/0163 , B81C1/00658 , G01L9/003 , G01L9/0072 , G01L9/0095
Abstract: A micro electro-mechanical system (MEMS) acoustic sensor is disclosed. The acoustic sensor comprises a backplate and a diaphragm. The acoustic sensor further comprises a flexible member and optional spacer member disposed between the backplate and the diaphragm resulting in a gap between the backplate and the diaphragm. The gap can vary in response to impinging pressure on the diaphragm based on the design of the flexible member and resulting in a variable capacitance between the backplate and the diaphragm. The change in the gap can result in a change in an electrical characteristic associated with the variable capacitance and can be converted to an electrical output signal corresponding to the impinging pressure on the diaphragm. The flexible member can be part of the backplate or diaphragm.
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Patent Agency Ranking
公开(公告)号：US09661433B2
公开(公告)日：2017-05-23
申请号：US14168983
申请日：2014-01-30
Applicant: InvenSense, Inc.
Inventor： James Salvia , Baris Cagdaser , Aleksey S. Khenkin
CPC classification number: H04R29/004 , G01H17/00 , G01V13/00 , H04R19/005 , H04R19/04 , H04R2201/003
Abstract: A method and circuit for testing an acoustic sensor are disclosed. In a first aspect, the method comprises using electro-mechanical features of the acoustic sensor to measure characteristic of the acoustic sensor. In a second aspect, the method comprises utilizing an actuation signal to evaluate mechanical characteristics of the acoustic sensor. In a third aspect, the method comprises using a feedthrough cancellation system to measure a capacitance of the acoustic sensor. In the fourth aspect, the circuit comprises a mechanism for driving an electrical signal into a signal path of the acoustic sensor to cancel an electrical feedthrough signal provided to the signal path, wherein any of the electrical signal and the electrical feedthrough signal are within or above an audio range.
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公开(公告)号：US20170067841A1
公开(公告)日：2017-03-09
申请号：US14849551
申请日：2015-09-09
Applicant: INVENSENSE, INC.
Inventor： Fang Liu , Martin Lim , Baris Cagdaser
CPC classification number: G01N27/046 , G01K7/16 , G01N27/128 , G01N27/4148
Abstract: The present invention relates to low power, low cost, and compact gas sensors and methods for making the same. In one embodiment, the gas sensor includes a heating element embedded in a suspended structure overlying a substrate. The heating element is configured to generate an amount of heat to bring the chemical sensing element to an operating temperature. The chemical sensing element is thermally coupled to the heating element. The chemical sensing element is also exposed to an environment that contains the gas to be measured. In one embodiment, the chemical sensing element comprises a metal oxide compound having an electrical resistance based on the concentration of a gas in the environment and the operating temperature of the chemical sensing element. In this embodiment, the operating temperature of the chemical sensing element is greater than room temperature and determined by the amount of heat generated by the heating element.
Abstract translation: 本发明涉及低功率，低成本和小型气体传感器及其制造方法。 在一个实施例中，气体传感器包括嵌入在衬底上的悬挂结构中的加热元件。 加热元件构造成产生一定量的热量以使化学传感元件达到工作温度。 化学传感元件热耦合到加热元件。 化学传感元件也暴露于含有待测气体的环境中。 在一个实施方案中，化学传感元件包括基于环境中的气体浓度和化学传感元件的操作温度具有电阻的金属氧化物化合物。 在该实施例中，化学传感元件的工作温度大于室温，并由加热元件产生的热量确定。
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公开(公告)号：US20160299014A1
公开(公告)日：2016-10-13
申请号：US14684711
申请日：2015-04-13
Applicant: INVENSENSE, INC.
Inventor： Xiang Li , Omid Oliaei , Julius Ming-Lin Tsai , Baris Cagdaser , Martin Lim
CPC classification number: G01K11/24 , G01K13/02 , G01K2013/024 , G01N29/024 , G01N2291/011 , G01N2291/014 , G01N2291/02845 , G01N2291/02881 , H04B11/00
Abstract: Acoustic ambient temperature and humidity sensing based on determination of sound velocity is described, in addition to sensors, algorithms, devices, systems, and methods therefor. An exemplary embodiment employs sound velocity in the determination of ambient temperature and humidity. Provided implementations include determinations of sound velocity based on time of flight of a coded acoustic signal and/or based on resonance frequency of a Helmholtz resonator.
Abstract translation: 除了传感器，算法，设备，系统及其方法之外，还描述了基于声速测定的声学环境温度和湿度感测。 示例性实施例在确定环境温度和湿度时采用声速。 提供的实现包括基于编码声信号的飞行时间和/或基于亥姆霍兹共振器的谐振频率来确定声速。
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公开(公告)号：US20160127845A1
公开(公告)日：2016-05-05
申请号：US14527235
申请日：2014-10-29
Applicant: INVENSENSE, INC.
Inventor： Baris Cagdaser , Renata Melamud Berger , Omid Oliaei , Aleksey S. Khenkin
IPC: H04R29/00
CPC classification number: H04R29/004 , H04R3/00 , H04R3/04 , H04R25/305 , H04R2201/003 , H04R2460/11 , H04R2499/11
Abstract: Systems and techniques for detecting blockage associated with a microelectromechanical systems (MEMS) microphone of a device are presented. The device includes a MEMS acoustic sensor and a processor. The MEMS acoustic sensor is contained in a cavity within the device. The processor is configured to detect a blockage condition associated with an opening of the cavity that contains the MEMS acoustic sensor.
Abstract translation: 提出了用于检测与设备的微机电系统（MEMS）麦克风相关联的阻塞的系统和技术。 该装置包括MEMS声学传感器和处理器。 MEMS声学传感器被包含在装置内的空腔中。 处理器被配置为检测与包含MEMS声学传感器的腔的开口相关联的阻塞状态。
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公开(公告)号：US08797090B1
公开(公告)日：2014-08-05
申请号：US13793899
申请日：2013-03-11
Applicant: InvenSense, Inc.
Inventor： Derek Shaeffer , Baris Cagdaser
Abstract: A charge pump circuit is disclosed. The charge pump circuit comprises a transfer capacitor receiving a first clock phase and a driving capacitor receiving a second clock phase, the second clock phase opposite to the first clock phase. The circuit includes a first switch coupling an input node to the transfer capacitor. The first switch being controlled by the driving capacitor. The circuit further includes a second switch coupling the input node to the driving capacitor. The second switch being controlled by the transfer capacitor. The circuit also includes a third switch coupling the transfer capacitor to an output node. The third switch being controlled by the driving capacitor. The third switch operating in phase opposition to the first switch. The circuit finally includes a charge storage capacitor coupled to the output node.
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