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公开(公告)号：US10172090B1
公开(公告)日：2019-01-01
申请号：US15795081
申请日：2017-10-26
Applicant: InvenSense, Inc.
Inventor： Sriraman Dakshinamurthy , Stanley Bo-Ting Wang
Abstract: A sensor headroom control circuit includes a front end analog circuit, a digital compensation circuit, and a headroom state selection circuit. The front end analog circuit has configurable headroom and is configured to receive a sensor input signal and output a sensor digital signal. The digital compensation circuit is configured to adjust the sensor digital signal to compensate for an active headroom state of the front end analog circuit and produce a compensated sensor signal. The headroom state selection circuit is configured to select the active headroom state of the front end analog circuit responsive to a detected level of the compensated sensor signal.
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Patent Agency Ranking
公开(公告)号：US10574259B2
公开(公告)日：2020-02-25
申请号：US15723814
申请日：2017-10-03
Applicant: InvenSense, Inc.
Inventor： Du Chen , Vadim Tsinker , Stanley Bo-Ting Wang
Abstract: A system includes a sensor device, a circuit driving he sensor device at a drive frequency, a receiver, and a low pass filter. The sensor device is configured to change its electrical characteristics in response to external stimuli. The sensor device generates a modulated signal proportional to the external stimuli. The receiver is configured to receive the modulated signal and further configured to demodulate the modulated signal to generate a demodulated signal. The demodulation signal has a guard band. The receiver consumes power responsive to receiving the modulated signal. The low pass filter is configured to receive the demodulated signal and further configured to generate a sensor output.
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公开(公告)号：US10416242B2
公开(公告)日：2019-09-17
申请号：US15699773
申请日：2017-09-08
Applicant: InvenSense, Inc.
Inventor： Stanley Bo-Ting Wang , Nikhil Acharya , Pruthvi Chaudhari
IPC: G05F1/10 , G05F3/02 , G01R31/396 , G01R31/28 , G01R19/10 , G11C5/14 , G01R31/3835
Abstract: A device includes a plurality of high voltage cells (HVC) coupled to a plurality of resistors, and a controller. The plurality of HVC generates an output voltage that is higher than an input voltage to the plurality of HVC. The controller receives a reference voltage and an output voltage from a resistor of the plurality of resistors. The controller generates a signal responsive to a difference between the reference voltage and the output voltage. The controller forms a closed feedback loop with the plurality of HVC and the plurality of resistors. The generated signal is input to the plurality of HVC. A substrate of a resistor of the plurality of resistors is biased to an output of at least one high voltage cell of the plurality of HVC. Output of the at least one high voltage cell is input to another high voltage cell.
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公开(公告)号：US20140085120A1
公开(公告)日：2014-03-27
申请号：US13624802
申请日：2012-09-21
Applicant: INVENSENSE, INC.
Inventor： Stanley Bo-Ting Wang , Derek K. Shaeffer
CPC classification number: H03M3/34
Abstract: An embodiment of the invention includes an analog to digital converter including a sigma delta modulator that generates a feedback signal. The sigma delta modulator includes a quantizer responsive to an input signal and the feedback signal and generates a quantizer output. The sigma delta modulator further includes a chopper-stabilized amplifier that provides a reference signal to the sigma delta modulator, and the chopper-stabilized amplifier is stabilized according to a combination of a chopping signal and the quantizer output.
Abstract translation: 本发明的实施例包括一个模数转换器，其包括产生反馈信号的Σ-Δ调制器。 Σ-Δ调制器包括响应于输入信号和反馈信号的量化器，并产生量化器输出。 Σ-Δ调制器还包括一个斩波稳定的放大器，该放大器向Σ-Δ调制器提供参考信号，并且斩波稳定放大器根据斩波信号和量化器输出的组合而被稳定。
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公开(公告)号：US10591318B2
公开(公告)日：2020-03-17
申请号：US15693107
申请日：2017-08-31
Applicant: InvenSense, Inc.
Inventor： Pablo Moreno Galbis , Du Chen , Stanley Bo-Ting Wang
IPC: G01D5/24 , G01C19/5776 , G01P15/125 , G01P21/00
Abstract: A circuit includes a sensor and a half-bridge circuit. The sensor includes a first sensor capacitor and a second sensor capacitor, where capacitances of the first sensor capacitor and the second sensor capacitor change in opposing directions responsive to receiving a physical signal. The sensor generates a plurality of sensor signals according to the physical signal, the plurality of signals including a common mode injection and a plurality of differential signals. The half-bridge circuit includes a first half-bridge capacitor and a second half-bridge capacitor, where capacitances of the first half-bridge capacitor and the second half-bridge capacitor compensate for the common mode injection of the plurality of sensor signals. The sensor and the half-bridge circuit are coupled to a plurality of sense nodes configured to output the plurality of differential signals.
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公开(公告)号：US08681029B1
公开(公告)日：2014-03-25
申请号：US13624802
申请日：2012-09-21
Applicant: Invensense, Inc.
Inventor： Stanley Bo-Ting Wang , Derek K. Shaeffer
IPC: H03M3/00
CPC classification number: H03M3/34
Abstract: An embodiment of the invention includes an analog to digital converter including a sigma delta modulator that generates a feedback signal. The sigma delta modulator includes a quantizer responsive to an input signal and the feedback signal and generates a quantizer output. The sigma delta modulator further includes a chopper-stabilized amplifier that provides a reference signal to the sigma delta modulator, and the chopper-stabilized amplifier is stabilized according to a combination of a chopping signal and the quantizer output.
Abstract translation: 本发明的实施例包括一个模数转换器，其包括产生反馈信号的Σ-Δ调制器。 Σ-Δ调制器包括响应于输入信号和反馈信号的量化器，并产生量化器输出。 Σ-Δ调制器还包括一个斩波稳定的放大器，该放大器向Σ-Δ调制器提供参考信号，并且斩波稳定放大器根据斩波信号和量化器输出的组合而被稳定。
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