-
公开(公告)号：US11949427B2
公开(公告)日：2024-04-02
申请号：US17089457
申请日：2020-11-04
Inventor： Gavin McVeigh
CPC classification number: H03M1/785 , G01L1/2268 , H03M1/0607 , H03M1/16 , H03M1/662 , H03M1/802 , H03F3/45 , H03M1/808
Abstract: The present disclosure relates to a compensation circuit for compensating for an offset voltage that is present in an output signal output by a force sensor. The compensation circuit comprises: voltage divider circuitry, the voltage divider circuitry configured to receive a bias voltage that is also supplied to the force sensor and to output a control voltage derived from the bias voltage, wherein a component mismatch ratio of the voltage divider circuitry is adjustable to correspond to a component mismatch ratio of the force sensor; current generator circuitry configured to receive the control voltage and to generate a compensating current based on the received control voltage; and amplifier circuitry configured to receive the differential signal output by the force sensor and the compensating current and to output a compensated differential output signal in which the offset voltage is at least partially cancelled.
-
公开(公告)号：US11948546B2
公开(公告)日：2024-04-02
申请号：US17858771
申请日：2022-07-06
Inventor： Samuel P. Ebenezer , Rachid Kerkoud
IPC: G10K11/178 , H04R1/10
CPC classification number: G10K11/17854 , G10K11/17823 , G10K11/17825 , G10K11/17881 , H04R1/1083 , G10K2210/1081 , G10K2210/3026 , G10K2210/3027 , G10K2210/3028 , G10K2210/3044 , H04R2460/01
Abstract: An adaptive noise-canceling system generates an anti-noise signal from a noise reference signal with a feed-forward filter that filters the noise reference signal to produce the anti-noise signal. The feed-forward filter has a first response controlled by a set of first coefficients. The adaptive noise-canceling system includes a measurement subsystem for measuring a characteristic of an acoustic environment of the adaptive noise-canceling system, a classifier for classifying the characteristic of the acoustic environment by analyzing an output of the measurement subsystem, and a controller that provides the set of first coefficients to the feed-forward filter in conformity with an output of the classifier. The controller may include a look-up table for providing sets of values of the first coefficients to the feed-forward filter in conformity with an indication provided from the classifier and corresponding to a classification of the characteristic of the acoustic environment of the adaptive noise-canceling system.
-
公开(公告)号：US11936373B2
公开(公告)日：2024-03-19
申请号：US17356606
申请日：2021-06-24
Inventor： Hamed Sadati , John A. Breslin , Sushanth Hegde , John L. Melanson
IPC: H03K17/30 , H03K17/042 , H03K17/06
CPC classification number: H03K17/302 , H03K17/04206 , H03K17/063
Abstract: Pre-conditioning circuitry for pre-conditioning a node of a circuit to support a change in operation of the circuit, wherein the circuit is operative to change a state of the node to effect the change in operation of the circuit, and wherein the pre-conditioning circuitry is configured to apply a voltage, current or charge directly to the node to reduce the magnitude of the change to the state of the node required by the circuit to achieve the change in operation of the circuit.
-
公开(公告)号：US11900730B2
公开(公告)日：2024-02-13
申请号：US17066137
申请日：2020-10-08
Inventor： John P. Lesso , Jason P. Rhode
CPC classification number: G06V40/50 , G06F17/18 , G10L15/02 , H04R1/1016 , H04R1/1075 , G10L2015/025 , H04R2460/13
Abstract: A method of biometric identification of a person comprises, during an enrolment phase determining at least one enrolment transfer function for bone conduction of an audio signal through an enrolling user's head. The enrolment transfer function is stored. During a verification phase, at least one verification transfer function for bone conduction of an audio signal through the person's head is determined. It is then determined from the at least one verification transfer function and the at least one enrolment transfer function whether the person is the enrolling user.
-
公开(公告)号：US11868540B2
公开(公告)日：2024-01-09
申请号：US17096598
申请日：2020-11-12
Inventor： Ryan Hellman
CPC classification number: G06F3/0202 , G01L1/005 , G01L1/14 , G01L1/162 , G01L1/183
Abstract: A method for determining sensor parameters of an actively-driven sensor system may include obtaining as few as three samples of a measured physical quantity versus frequency for the actively-driven sensor system, performing a refinement operation to provide a refined version of the sensor parameters based on the as few as three samples and based on a linear model of an asymmetry between slopes of the measured physical quantity versus frequency between pairs of the as few as three samples, iteratively repeating the refinement operation until the difference between successive refined versions of the sensor parameters is below a defined threshold, and outputting the refined sensor parameters as updated sensor parameters for the actively-driven sensor system.
-
Patent Agency Ranking
16.发明授权公开(公告)号：US11856366B2
公开(公告)日：2023-12-26
申请号：US17079578
申请日：2020-10-26
Inventor： John Paul Lesso , Cedric Andrieu , Calum Cuthill
IPC: H04R23/00 , H04B1/04 , H04B11/00 , H04R3/04 , H03G3/20 , G01S7/52 , G01S7/524 , G01S15/10 , H03G3/00
CPC classification number: H04R23/00 , G01S7/52004 , G01S7/524 , G01S15/10 , H03G3/005 , H03G3/20 , H04B1/04 , H04B11/00 , H04R3/04 , H04R2420/01 , H04R2499/11
Abstract: Driver circuitry is disclosed for driving an electroacoustic transducer to provide an output comprising both ultrasonic and audio signal components. The driver circuitry comprises an adjustment module configured to reduce the level of said ultrasonic component signal in response to an increase in an operational variable indicative of a level of said audio signal component, while also increasing the pulse duration, duty cycle, repetition frequency or frequency span or bandwidth of the ultrasonic component.
-
公开(公告)号：US11855597B2
公开(公告)日：2023-12-26
申请号：US17741180
申请日：2022-05-10
Inventor： Sameer Baveja , Hamed Sadati
CPC classification number: H03F3/45479 , H03F1/26 , H03F1/52 , H03F2200/03 , H03F2200/153 , H03F2200/78
Abstract: This application relates to circuitry for monitoring for instability of an amplifier. The amplifier (100) has a first signal path between an amplifier input (INN) and an amplifier output (VOUT) and a feedback path from the output to form a feedback loop with at least part of the first signal path. A comparator (212) has a first input configured to receive a first signal (INN) derived from a first amplifier node which is part of said feedback loop and a second input configured to receive a second signal (INP) derived from a second amplifier node which varies with the signal at the amplifier input but does not form part of said feedback loop. The comparator is configured to compare the first signal to the second signal and generate a comparison signal (COMP), wherein in the event of amplifier instability the comparison signal comprises a characteristic indicative of amplifier instability.
-
公开(公告)号：US11855531B2
公开(公告)日：2023-12-26
申请号：US17582836
申请日：2022-01-24
Inventor： Changjong Lim
CPC classification number: H02M3/07 , H02M1/0095
Abstract: A power converter for converting an input voltage at an input of the power converter into an output voltage at an output of the power converter may include a switching node, a power inductor coupled between the switching node and the output, a flying capacitor having a first flying capacitor terminal and a second flying capacitor terminal, a pump capacitor having a first pump capacitor terminal and a second pump capacitor terminal, the second pump capacitor terminal coupled to ground, a first switch coupled between the input and the first flying capacitor terminal, a second switch coupled between the first flying capacitor terminal and the switching node, a third switch coupled between the second flying capacitor terminal and the switching node, a fourth switch coupled between the second flying capacitor terminal and a ground voltage, a fifth switch coupled between the second flying capacitor terminal and the first pump capacitor terminal, and a sixth switch coupled between the output and the first pump capacitor terminal.
-
公开(公告)号：US11829461B2
公开(公告)日：2023-11-28
申请号：US18101843
申请日：2023-01-26
Inventor： John Paul Lesso , John Forsyth
CPC classification number: G06F21/32 , G06F3/165 , G10K11/1783 , G10K11/17823 , H04R1/1041 , G10K2210/1081 , G10K2210/3055 , G10L25/51 , H04R1/028 , H04R29/00
Abstract: The present invention relates to methods, apparatus and systems for audio playback via a personal audio device following a biometric process. A personal audio device may be used to obtain ear model data for authenticating a user via an ear biometric authentication system. Owing to that successful authentication, the electronic device is informed of the person who is listening to audio playback from the device. Thus the device can implement one or more playback settings which are specific to that authorised user.
-
公开(公告)号：US11815534B2
公开(公告)日：2023-11-14
申请号：US17678345
申请日：2022-02-23
Inventor： Tahir Rashid , Mehul Mistry
CPC classification number: G01R19/0023 , H03G3/3042
Abstract: This invention relates to current sensing, in particular for a signal processing circuit (500) for outputting an output signal (Sout) based on an input signal (Sin). An output stage (101) includes an output transistor (102) driven, in use, by a drive signal. A current monitor (501) is configured to monitor, in use, a first current through the output transistor, wherein the current monitor comprises a current sensor (105) having a sense transistor (106) configured to be driven based on the drive signal so as to generate a sense current related to the first current. A compensation controller (301) receives an indication of signal level of the input signal and controllably varies operation of the current monitor (501) so as to at least partially compensate for signal-dependent variation in a relationship between the first current and the first sense current.
-
-
-
-
-
-
-
-
-
Search Results
1975
records
(took 0.153 seconds)
