公开(公告)号：US12015386B2

公开(公告)日：2024-06-18

申请号：US17913811

申请日：2021-03-25

Applicant: SeekOps Inc.

Inventor： Javad Rezanezhad Gatabi ,  Brendan James Smith

IPC: G06G7/24 ,  H03H11/12 ,  H03H11/04

CPC classification number: H03H11/1291 ,  H03H11/1221 ,  H03H2011/0494

Abstract: Systems, devices, and methods including a first band-pass filter configured to receive and filter a detector signal, where the first band-pass filter has a central frequency of 2f; a second band-pass filter configured to receive and filter the detector signal where the second band-pass filter has a central frequency of 1f; a first logarithmic amplifier (Log Amp) configured to apply the filtered detector signal from the first band-pass filter; a second Log Amp configured to apply the filtered detector signal from the second band-pass filter; a differential amplifier configured to subtract the applied signal from the first Log Amp from the applied signal from the second Log Amp; and an Anti-Log Amplifier configured to determine an inverse logarithm of the subtracted signal from the differential amplifier.

公开(公告)号：US12003225B2

公开(公告)日：2024-06-04

申请号：US17306986

申请日：2021-05-04

Applicant: Intel Corporation

Inventor： Harald Enzinger ,  Steffen Trautmann

IPC: H03H11/04 ,  H03G3/30 ,  H03H11/12 ,  H03H21/00

CPC classification number: H03H11/1291 ,  H03G3/3042 ,  H03H11/0405 ,  H03H21/0012 ,  H03H2011/0494 ,  H03H2021/0079

Abstract: The present disclosure relates to a concept of nonlinear signal processing which may be used for predistortion for RF power amplifiers. The concept includes generating time variant filter coefficients for a linear filter circuit based on a nonlinear mapping of an input signal, and filtering the input signal with the linear filter circuit using the time variant filter coefficients in order to generate a filtered output signal. Thus, it is proposed to implement a non-linear filter by a time-varying linear filter where the time-varying coefficients are derived from the input signal.

公开(公告)号：US11962278B2

公开(公告)日：2024-04-16

申请号：US17318959

申请日：2021-05-12

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Abbas Mohamed Helmy ,  Mehran Bakhshiani ,  Francesco Gatta ,  Hasnain Lakdawala ,  Rahul Karmaker ,  Shankar Guhados

IPC: H03F3/45 ,  H03G3/30 ,  H03H11/12 ,  H03H19/00 ,  H04B1/00 ,  H04B1/16 ,  H04B1/18

CPC classification number: H03F3/45475 ,  H03G3/30 ,  H03H11/1226 ,  H03H19/004 ,  H04B1/0032 ,  H04B1/0039 ,  H04B1/0042 ,  H04B1/0078 ,  H04B1/1615 ,  H04B1/18 ,  H03F2200/129 ,  H03F2200/165 ,  H03F2203/45526

Abstract: An aspect includes a filtering method including operating a first filter to filter a first input signal to generate a first output signal; operating a second filter to filter a second input signal to generate a second output signal; and selectively coupling at least a portion of the second filter with the first filter to filter a third input signal to generate a third output signal. Another aspect includes a filtering method including operating switching devices to configure a filter with a first set of pole(s); filtering a first input signal to generate a first output signal with the filter configured with the first set of pole(s); operating the switching devices to configure the filter with a second set of poles; and filtering a second input signal to generate a second output signal with the filter configured with the second set of poles.

公开(公告)号：US11876499B2

公开(公告)日：2024-01-16

申请号：US17348556

申请日：2021-06-15

Applicant: Anlotek Limited

Inventor： Jorgen Staal Nielsen

IPC: H03H11/00 ,  H03H11/12 ,  H03H7/01

CPC classification number: H03H11/1208 ,  H03H7/0161 ,  H03H11/1291 ,  H03H2210/015

Abstract: A method of stabilizing a variable filter for an analog electromagnetic signal against circuit oscillation includes the steps of: providing a signal loop comprising a signal input, a signal output, and a plurality of variable circuit elements connected in the signal loop, the plurality of variable circuit elements comprising an adjustable resonator and an adjustable gain block, the signal loop having a variable frequency response that is characterized by a central frequency, a frequency passband, a response Q, and an operating point and a resonator response curve that are plottable in a Cartesian s-plane having an origin, a real axis, and an imaginary axis; and maintaining stability of the variable filter within an operating range by controlling the adjustable resonator and the adjustable gain block such that, in the Cartesian s-plane, the resonator response curve satisfies an orthogonality stability condition.

公开(公告)号：US11863140B2

公开(公告)日：2024-01-02

申请号：US17318968

申请日：2021-05-12

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Abbas Mohamed Helmy ,  Mehran Bakhshiani ,  Francesco Gatta

IPC: H04L27/06 ,  H03F3/45 ,  H03G3/30 ,  H03H11/12 ,  H03H19/00 ,  H04B1/00 ,  H04B1/16 ,  H04B1/18

CPC classification number: H03F3/45475 ,  H03G3/30 ,  H03H11/1226 ,  H03H19/004 ,  H04B1/0032 ,  H04B1/0039 ,  H04B1/0042 ,  H04B1/0078 ,  H04B1/1615 ,  H04B1/18 ,  H03F2200/129 ,  H03F2200/165 ,  H03F2203/45526

Abstract: An aspect includes a filtering method including operating a first filter to filter a first input signal to generate a first output signal; operating a second filter to filter a second input signal to generate a second output signal; and merging at least a portion of the second filter with the first filter to filter a third input signal to generate a third output signal. Another aspect includes a filtering method including operating switching devices to configure a filter with a first set of pole(s); filtering a first input signal to generate a first output signal with the filter configured with the first set of pole(s); operating the switching devices to configure the filter with a second set of poles; and filtering a second input signal to generate a second output signal with the filter configured with the second set of poles.

公开(公告)号：US20230402986A1

公开(公告)日：2023-12-14

申请号：US17840093

申请日：2022-06-14

Applicant: Apple Inc.

Inventor： Xi Yao ,  Hao Xu ,  Pengbei Zhang ,  Aly Mohamed Mamdouh Ismail

IPC: H03H7/01 ,  H03H7/075 ,  H04B1/18 ,  H03H11/12

CPC classification number: H03H7/0115 ,  H03H7/075 ,  H03H7/1741 ,  H04B1/18 ,  H03H11/12

Abstract: This disclosure is directed to filtering in a transceiver of an electronic device. In some instances, active analog filters may be deployed in the transceiver of the electronic device to achieve greater linearity and/or reduce noise in the transceiver. However, as signal bandwidth grows increasingly larger, an active analog filter may consume excessive power. To remedy the excessive power consumption, a passive ladder LC filter may be used. Some LC ladder filters may include a limited quality factor (Q), which may lead to undesirable effects in the transceiver (e.g., voltage droop). To address these undesirable effects, certain components in the LC ladder filter may be relocated from an input port to a feedback chain of an amplifier coupled to the LC ladder filter. The new structure may enable components in the LC ladder filter to be tuned without causing additional voltage droop across the LC ladder filter.

公开(公告)号：US20230039114A1

公开(公告)日：2023-02-09

申请号：US17879980

申请日：2022-08-03

Applicant: FON DA TECH CO., LTD. ,  SHENG-KAI CO., LTD.

Inventor： CHUNG-LIANG LIN

IPC: H03H11/12

Abstract: An embodiment of the present disclosure provides a power noise suppression circuit for machine equipment, which dynamically obtains a noise component in an input voltage provided by the power supply, generates a noise voltage accordingly, and compares the noise voltage with a feedback voltage to obtain a stable and low-noise power voltage, wherein the feedback voltage is generated by the power noise suppression circuit according to the power voltage. Therefore, the power noise suppression circuit of the embodiment of the present disclosure is particularly suitable for use in the machine equipment which is needed to be monitored and/or controlled precisely, such as a precision machining equipment or a semiconductor manufacturing equipment.

公开(公告)号：US20220390418A1

公开(公告)日：2022-12-08

申请号：US17702513

申请日：2022-03-23

Applicant: The Boeing Company

Inventor： Morteza Safai ,  Ryan M. Clancy ,  Kelly A. DeLawder

IPC: G01N29/32 ,  H03M1/06 ,  B06B1/06 ,  H03H11/12 ,  H03H17/02 ,  G01N29/24 ,  G01N29/44 ,  G01N29/04 ,  A61B8/00

Abstract: A system and method for detecting an anomaly in a structure using an adaptive filter to compensate for variations in piezoelectric transducer performance due to environmental factors such as temperature. A first voltage signal having a first amplitude is sent to a reference piezoelectric actuator. Thereafter, a first reference voltage signal is received from a reference piezoelectric receiver which is acoustically coupled to detect the guided wave generated by the reference piezoelectric actuator. A second amplitude is determined using an optimization algorithm of an adaptive filter to compensate for nonlinear behavior of the reference piezoelectric actuator and receiver based on the first reference voltage signal. Then the adaptive filter sends a second voltage signal having the second amplitude to the reference and test piezoelectric actuators. Reference and test voltage signals are received from the reference and test piezoelectric receivers in response to the second voltage signal. A difference voltage signal representing differences between the reference and test voltage signals received is then recorded.

公开(公告)号：US20220329218A1

公开(公告)日：2022-10-13

申请号：US17849599

申请日：2022-06-25

Applicant: RDA Microelectronics (Shanghai) Co., Ltd.

Inventor： Yiwei Song ,  Tao Zhou

IPC: H03F3/213 ,  H03H19/00 ,  H03H11/12

Abstract: The present disclosure provides an audio amplifying circuit and a playing device, including: N-order filters and an integrated circuit; after an original audio signal passes through the N-order filters, a filtered signal is obtained; after the filtered signal passes through the integrated circuit, a corresponding digital signal is output; where the number of operational amplifiers adopted in the N-order filters is smaller than N, and N is a natural number greater than 1.

公开(公告)号：US20220321105A1

公开(公告)日：2022-10-06

申请号：US17708863

申请日：2022-03-30

Applicant: Synopsys, Inc.

Inventor： Mohammed Tawfik Mahmoud Mohammed AbdelHafez

IPC: H03H11/12 ,  H03H7/01 ,  H03M1/10

Abstract: A first and second input tone are applied to a continuous-time complex filter within an integrated circuit. The magnitude of the output of the filter at the frequency of each of the first and second input tones are measured and compared to determine the value of a filter tuning control signal. A tuning control signal is applied to the filter with the determined value to tune the filter.