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公开(公告)号：US20250147078A1
公开(公告)日：2025-05-08
申请号：US18590241
申请日：2024-02-28
Inventor： Hemant SHUKLA , Sven SOELL , Paul WILSON , Deep SAXENA , Beata K. KUBIAK , Ross C. MORGAN , Malcolm BLYTH , Angus BLACK
Abstract: A current sensing system for sensing current through first and second circuit elements of a circuit in which the first and second circuit elements are active in respective first and second phases of an operational cycle of the circuit, the current sensing system comprising: first current sensing circuitry for sensing a current through the first circuit element; second current sensing circuitry for sensing a current through the second circuit element; and summation circuitry coupled to an output of the first current sensing circuitry and an output of the second current sensing circuitry, wherein the summation circuitry is configured to output a summation signal indicative of a sum of the sensed current through the first circuit element and the sensed current through the second circuit element so as to provide an indication of a total current drawn over an operational cycle of the circuit.
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公开(公告)号：US20220247372A1
公开(公告)日：2022-08-04
申请号：US17162229
申请日：2021-01-29
Inventor： Wei XU , Ravi KUMMARAGUNTLA , Paul WILSON , Mujo KOZAK , Christian LARSEN , John L. MELANSON , Yongjie CHENG
IPC: H03F3/45
Abstract: A system may include a front end differential amplifier having two input terminals, two input resistors, each of the two input resistors coupled to a respective one of the two input terminals, and an input common mode biasing circuit for an output stage of the front end differential amplifier, the input common mode biasing circuit comprising two current sources configured to generate currents for biasing the output stage of the front end differential amplifier.
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公开(公告)号：US20200003719A1
公开(公告)日：2020-01-02
申请号：US16567727
申请日：2019-09-11
Inventor： Paul WILSON , Karthikeya KODUR
Abstract: This application relates to methods and apparatus for operating MEMS sensors, in particular MEMS capacitive sensors (CMEMS) such as a microphones. An amplifier apparatus is arranged to amplify an input signal (VINP) received at a sense node from the MEMS capacitive sensor. An antiphase signal generator generates a second signal (VINN) which is in antiphase with the input signal (VINP) and an amplifier arrangement is configured to receive the input signal (VINP) at a first input and the second signal (VINN) at a second input and to output corresponding amplified first and second output signals. This converts a single ended input signal effectively into a differential input signal.
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公开(公告)号：US20180301920A1
公开(公告)日：2018-10-18
申请号：US15951240
申请日：2018-04-12
Inventor： James Thomas DEAS , Paul WILSON
Abstract: Devices are disclosed including a transducer device comprising a first circuit for operating a MEMS transducer and connected to a supply terminal for receiving a power supply voltage, and a power consumption levelling circuit for dissipating a correction power and arranged to adjust the correction power to at least partially offset a change in power consumption of the first circuit due to a change in the power supply voltage.
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公开(公告)号：US20230179217A1
公开(公告)日：2023-06-08
申请号：US17987448
申请日：2022-11-15
Inventor： Paul WILSON , James T. DEAS , Mucahit KOZAK , Graeme G. MACKAY
CPC classification number: H03M1/1023 , H03M1/0609
Abstract: Coulomb counter circuitry operable in a first mode of operation and a second mode of operation, the coulomb counter circuitry comprising: first analog to digital converter (ADC) circuitry configured to generate a first ADC output signal indicative of a current through a load coupled to the coulomb counter circuitry; second analog to digital converter (ADC) circuitry; offset correction circuitry; and accumulator circuitry configured to generate a signal indicative of a cumulative amount of charge transferred to the load, wherein in the second mode of operation, the coulomb counter circuitry is operable to enable the second ADC circuitry and to generate an offset correction factor based at least in part on a second ADC output signal output by the second ADC circuitry, and wherein in subsequent operation of the coulomb counter circuitry in the first mode of operation, the offset correction circuitry applies the offset correction factor to the first ADC output signal.
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Patent Agency Ranking
公开(公告)号：US20220263519A1
公开(公告)日：2022-08-18
申请号：US17667953
申请日：2022-02-09
Inventor： John L. MELANSON , Axel THOMSEN , Mucahit KOZAK , Paul WILSON , Eric J. KING
IPC: H03M3/00
Abstract: A signal processing system may include a sensor readout channel configured to convert an electronic signal into a digital quantity. The sensor readout channel may include a first-order sigma-delta modulator having a modulator input and a modulator output, first outside chopping switches located at the modulator input, second outside chopping switches located at the modulator output, an auxiliary path comprising an analog-to-digital converter (ADC) having an auxiliary path input and an auxiliary path output, the auxiliary path input configured to receive as its input signal a signal output by a memory element of the first-order sigma-delta modulator, and a signal combiner configured to combine a modulator output signal generated by the first-order sigma-delta modulator with an auxiliary path output signal generated by the auxiliary path to generate a combined output signal.
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公开(公告)号：US20240305308A1
公开(公告)日：2024-09-12
申请号：US18192257
申请日：2023-03-29
Inventor： Paul WILSON , Ivan PERRY , John PRIESTLEY , James WELLS
CPC classification number: H03M1/121 , H03M1/1023
Abstract: Circuitry for processing an analyte signal obtained from an electrochemical cell, the circuitry comprising: a first signal path between a first electrode of the electrochemical cell and a first input of an analog-to-digital converter (ADC) circuit, the first signal path comprising a first gain stage configured to convert the analyte signal to a first analog signal; a second signal path between the first electrode and a second input of the ADC circuit, the second signal path comprising a second gain stage configured to convert the analyte signal to a second analog signal; and switching circuitry configured to selectively couple the first electrode to the first input of the ADC circuit.
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公开(公告)号：US20240056095A1
公开(公告)日：2024-02-15
申请号：US17885126
申请日：2022-08-10
Inventor： Arashk NOROUZPOURSHIRAZI , Stephen T. HODAPP , Ravi K. KUMMARAGUNTLA , Paul WILSON , Axel THOMSEN
Abstract: A system may include a switched-capacitor analog front end comprising a plurality of switches for sampling an analog physical quantity and a bootstrap generation network electrically coupled to the plurality of switches and configured to generate a bootstrap sampling clock for controlling the plurality of switches and generate a floating supply voltage for the bootstrap sampling clock based on the analog physical quantity.
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公开(公告)号：US20220263520A1
公开(公告)日：2022-08-18
申请号：US17232949
申请日：2021-04-16
Inventor： Axel THOMSEN , John L. MELANSON , Mujo KOZAK , Paul WILSON , Eric J. KING
IPC: H03M3/00 , G01R31/3828 , G01R31/36
Abstract: A signal processing system may include a sensor readout channel configured to convert an electronic signal into a digital quantity, the sensor readout channel comprising an analog-to-digital converter (ADC) having an input and an output, first outside chopping switches located at the input of the ADC, and second outside chopping switches located at the output of the ADC. The ADC may comprise a memory element, first inside chopping switches located at the input of the memory element, and second inside chopping switches located at the output of the memory element. The first outside chopping switches, the second outside chopping switches, the first inside chopping switches, and the second inside chopping switches may be switched at the same frequency such that the memory element is swapped periodically in synchronization with the first outside chopping switches and second outside chopping switches.
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公开(公告)号：US20180246052A1
公开(公告)日：2018-08-30
申请号：US15904737
申请日：2018-02-26
Inventor： Paul WILSON , Karthikeya KODUR
Abstract: This application relates to methods and apparatus for operating MEMS sensors, in particular MEMS capacitive sensors (CMEMS) such as a microphones. An amplifier apparatus (300) is arranged to amplify an input signal (VINP) received at a sense node (104) from the MEMS capacitive sensor. An antiphase signal generator (201; 304) generates a second signal (VINN) which is in antiphase with the input signal (VINP) and an amplifier arrangement (105; 305) is configured to receive the input signal (VINP) at a first input and the second signal (VINN) at a second input and to output corresponding amplified first and second output signals. This converts a single ended input signal effectively into a differential input signal.
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