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公开(公告)号：US20190011291A1
公开(公告)日：2019-01-10
申请号：US15926276
申请日：2018-03-20
Inventor： Vamsikrishna PARUPALLI , Zhong YOU , Gaurav AGARWAL , Vikrant ARUMUGAM , Johann G. GABORIAU , Nishant JAIN
IPC: G01D5/24 , G01R27/26 , H04L27/144 , G01R29/26
Abstract: A method for measuring a capacitive sensor output may include applying an excitation signal to a capacitor of the capacitive sensor which causes generation of a modulated signal from a baseband signal, wherein the excitation signal is of a carrier frequency which is higher than frequency content of the baseband signal, demodulating the modulated signal to generate an output signal representative of a capacitance of the capacitor wherein the demodulating is based, at least in part, on the excitation signal, determining whether noise in the modulated signal is caused by interference at approximately the carrier frequency, and in response to determining noise in the modulated signal is caused by interference at approximately the carrier frequency, modifying the carrier frequency to another frequency to reduce noise caused in the modulated signal by the interference.
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2.发明公开公开(公告)号：US20240186950A1
公开(公告)日：2024-06-06
申请号：US18475480
申请日：2023-09-27
Inventor： Nishant JAIN , Vamsikrishna PARUPALLI , Gaurav AGARWAL
CPC classification number: H03F1/02 , H03F3/217 , H03F3/45071 , H03F2200/129 , H03F2200/414
Abstract: A system may include a pulse-width modulation mode path configured to drive a load at an output of the system in a first mode of operation, a linear mode path configured to drive the load in a second mode of operation, a common mode control feedback loop configured to set a value of a common mode output signal at the output in the second mode of operation, and an auxiliary circuit coupled to the common mode feedback control loop and configured to maintain a state of the common mode feedback control loop during the first mode of operation as the state was or will be during the second mode of operation.
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