公开(公告)号：US12047046B2

公开(公告)日：2024-07-23

申请号：US17721885

申请日：2022-04-15

Applicant: Ig Soo Kwon

Inventor： Ig Soo Kwon

IPC: H03G3/30 ,  G01R31/42 ,  H03F3/04 ,  H03K3/037

CPC classification number: H03G3/30 ,  G01R31/42 ,  H03F3/04 ,  H03K3/037 ,  H03G2201/103

Abstract: A calibration amplifier includes: a plurality of transistors and a variable resistor configured to change in response to clock pulses. During a calibration cycle, one of the plurality of transistors switches on in each calibration step based on a plurality of enable signals, and a gain of the calibration amplifier changes until an output voltage of the calibration amplifier exceeds a reference voltage and is set to a calibrated gain. The calibration amplifier outputs the output voltage by amplifying an input voltage using the calibrated gain.

公开(公告)号：US12041434B2

公开(公告)日：2024-07-16

申请号：US18296266

申请日：2023-04-05

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul Lesso ,  Mark James Mccloy-Stevens ,  John Bruce Bowlerwell ,  Yanto Suryono ,  Xin Zhao ,  Morgan Timothy Prior

IPC: H04R5/04 ,  H03F3/183 ,  H03G3/30 ,  H04R5/02 ,  H04R29/00 ,  H04S1/00

CPC classification number: H04R5/04 ,  H03F3/183 ,  H03G3/3005 ,  H04R5/02 ,  H04R29/001 ,  H04S1/007 ,  H03G2201/103

Abstract: This application relates to audio driving circuitry (100), and in particular to audio driving circuitry for outputting first and second audio driving signals for driving a stereo audio load (106), which may be a stereo audio load of an accessory apparatus (102) removably coupled to the audio driving circuitry in use. A load monitor (111) is provided for monitoring to monitor, from a monitoring node (112), an indication of a common mode return current passing through a common return path, together with an indication of a common mode component of the first and second audio driving signals and to determine an impedance characteristic of the stereo audio load. The load monitor (111) can provide dynamic monitoring of any significant change in load impedance. In some embodiments the load monitor (111) comprises an adaptive filter (301) which adapts a parameter of the filter which is related to the load impedance so as to determine the indication of load impedance.

公开(公告)号：US20240235501A9

公开(公告)日：2024-07-11

申请号：US18048225

申请日：2022-10-20

Applicant: MACOM Technology Solutions Holdings, Inc.

Inventor： Duy P. Nguyen ,  Nguyen L.K. Nguyen ,  Thanh T. Pham ,  Trong Phan ,  Stefano D'Agostino ,  Wayne Kennan

IPC: H03F3/45 ,  H03G3/30

CPC classification number: H03F3/4508 ,  H03G3/30 ,  H03F2200/447 ,  H03F2200/468 ,  H03G2201/103

Abstract: Amplifiers with temperature-adaptive gain and peaking gain control are described. In one example, a temperature-adaptive amplifier includes an amplifier, a temperature sense circuit, and a peaking control level shifter to bias shift the output of the amplifier and adjust a peaking gain of the amplifier based on the temperature control signal. The peaking control level shifter can adjust a peaking gain of the amplifier based on the temperature control signal. The temperature-adaptive control can help to compensate for peaking gain in amplifiers based on the operating temperature of the amplifier. The control can help to compensate for unwanted changes in amplifier peaking gain, over time, resulting in more consistent peaking gain over the full operating frequency range of amplifiers.

公开(公告)号：US12034421B2

公开(公告)日：2024-07-09

申请号：US18309461

申请日：2023-04-28

Applicant: Biamp Systems, LLC

Inventor： Eugene Goff ,  Ray Dippert ,  Matthew V. Kotvis ,  Samarth Behura

IPC: H03G5/16 ,  G06F3/16 ,  G10L21/0232 ,  H04R1/10 ,  H04R1/40 ,  H04R3/00 ,  H04R3/04 ,  H04R3/12 ,  H04R5/04 ,  H04R27/00 ,  H04R29/00 ,  H04S7/00 ,  G10L21/0208 ,  G10L21/0216

CPC classification number: H03G5/165 ,  G06F3/16 ,  G10L21/0232 ,  H04R1/1083 ,  H04R1/403 ,  H04R1/406 ,  H04R3/005 ,  H04R3/04 ,  H04R3/12 ,  H04R5/04 ,  H04R27/00 ,  H04R29/001 ,  H04R29/002 ,  H04R29/007 ,  H04S7/301 ,  G10L2021/02082 ,  G10L2021/02166 ,  H03G2201/103 ,  H04R2227/001 ,  H04R2227/003 ,  H04R2430/01

Abstract: An example method of operation may include initiating an automated tuning procedure, detecting via one or more microphones a sound measurement associated with an output of one or more speakers at two or more locations, determining a number of speech transmission index (STI) values equal to a number of microphones, and averaging the speech transmission index values to identify a single speech transmission index value.

公开(公告)号：US12021495B2

公开(公告)日：2024-06-25

申请号：US17566334

申请日：2021-12-30

Applicant: SKYWORKS SOLUTIONS, INC.

Inventor： Junhyung Lee ,  Johannes Jacobus Emile Maria Hageraats ,  Yan Yan ,  Bumkyum Kim ,  Aravind Kumar Padyana ,  Joshua Haeseok Cho ,  Rimal Deep Singh ,  Bipul Agarwal

IPC: H04B1/40 ,  H03F1/02 ,  H03F1/56 ,  H03F3/19 ,  H03F3/72 ,  H03G3/30

CPC classification number: H03G3/3036 ,  H03F3/19 ,  H04B1/40 ,  H03F2200/451 ,  H03G2201/103 ,  H03G2201/307

Abstract: Disclosed herein are signal amplifiers that include a plurality of switchable amplifier architectures so that particular gain modes can use dedicated amplifier architectures to provide desired characteristics for those gain modes, such as low noise figure or high linearity. The disclosed signal amplifier architectures provide tailored impedances using a degeneration block or matrix without using switches in the degeneration switching block. The disclosed signal amplifier architectures provide a plurality of gain modes where different gain modes use different paths through the amplifier architecture. Switches that are used to select the path through the amplifier architecture also provide targeted impedances in a degeneration block or matrix. The switches that select the gain path are provided in the amplifier architecture and are thus not needed or used in the degeneration block, thereby reducing the size of the package for the amplifier architecture.

公开(公告)号：US20240187026A1

公开(公告)日：2024-06-06

申请号：US18382015

申请日：2023-10-19

Applicant: Skyworks Solutions, Inc.

Inventor： Carlos J. Briseno-Vidrios ,  Gabor Marek

IPC: H04B1/10 ,  H03F3/45 ,  H03G3/30 ,  H03K19/0175 ,  H04B1/12 ,  H04B1/16

CPC classification number: H04B1/1027 ,  H03F3/45475 ,  H03G3/3089 ,  H03K19/017509 ,  H04B1/123 ,  H04B1/1615 ,  H03G2201/103

Abstract: A method includes adjusting a peaking frequency of a receiver signal path of a first integrated circuit die of the isolator product and a gain of the receiver signal path based on a predetermined peaking frequency, a predetermined gain, a first level of a diagnostic signal during a first interval, and a second level of the diagnostic signal during a second interval. The first interval and the second interval can be non-overlapping intervals.

公开(公告)号：US11996813B2

公开(公告)日：2024-05-28

申请号：US17476468

申请日：2021-09-15

Applicant: Debones Dos Reis

Inventor： Debones Dos Reis

IPC: H03F3/21 ,  H03G5/16 ,  H04R3/04 ,  H04R3/12

CPC classification number: H03G5/165 ,  H03F3/21 ,  H04R3/04 ,  H04R3/12 ,  H03F2200/03 ,  H03G2201/103 ,  H04R2430/01

Abstract: An electronic circuit includes a microcontroller and a DSP (Digital Signal Processor), where the differential of the electronic circuit now proposed, is to transfer the output power to one of the different channels in a free and individual way, from one side to the other, being able to equalize and amplify each channel (speaker), permitting the power division not necessarily equal to said channels.

公开(公告)号：US20240162873A1

公开(公告)日：2024-05-16

申请号：US18055647

申请日：2022-11-15

Applicant: MACOM Technology Solutions Holdings, Inc.

Inventor： Nguyen Nguyen ,  Trong Phan ,  William Allen

IPC: H03G3/30 ,  H03F3/45

CPC classification number: H03G3/30 ,  H03F3/4508 ,  H01L21/78 ,  H03F2203/45022 ,  H03G2201/103

Abstract: An amplifier circuit has a variable gain amplifier including an input receiving an input signal and an open-conduction output, and an output stage including an input coupled to the open-conduction output of the variable gain amplifier and an output providing an output signal of the amplifier circuit. The variable gain amplifier has a first transistor and second transistor each having a control input receiving the input signal. A third transistor has a control terminal receiving a control signal and a first conduction terminal coupled to a first conduction terminal of the first transistor and a second conduction terminal being a first terminal of the open-conduction output. A fourth transistor has a control terminal receiving the control signal and a first conduction terminal coupled to a first conduction terminal of the second transistor and a second conduction terminal being a second terminal of the open-conduction output.

公开(公告)号：US11979125B2

公开(公告)日：2024-05-07

申请号：US17690629

申请日：2022-03-09

Applicant: Analog Devices, Inc.

Inventor： Gregory Lawrence Disanto

IPC: H03G3/30 ,  H03F3/04 ,  H03G3/00 ,  H03M7/16 ,  H03G1/00

CPC classification number: H03G3/002 ,  H03F3/04 ,  H03G3/30 ,  H03M7/165 ,  H03G1/0088 ,  H03G2201/103

Abstract: Techniques for setting a gain of an amplifier circuit in which the external resistor of the amplifier circuit is used to determine an internal gain setting to select. A voltage across the external resistor can be compared to an on-chip reference, and then used to program the desired gain. The techniques can mitigate or eliminate the need for a high-accuracy external resistor and can allow substantial improvements in initial gain accuracy and gain drift for existing boards and/or systems with only a bill of material change.

公开(公告)号：US11901926B2

公开(公告)日：2024-02-13

申请号：US17560136

申请日：2021-12-22

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Peter Alriksson ,  Joakim Axmon

IPC: H04W52/52 ,  H04B1/12 ,  H03G3/30

CPC classification number: H04B1/123 ,  H03G3/3078 ,  H04W52/52 ,  H03G2201/103 ,  H03G2201/702

Abstract: The gain of an amplifier in a receiver operating in a cellular communication system is controlled by determining one or more gain variability metrics, which are then used to produce first and second threshold values. A frequency difference between a current carrier frequency and a target carrier frequency is ascertained and then compared to the threshold values. Target gain setting production is based on comparison results: If the frequency difference is larger than the first threshold, a first automatic gain control algorithm is performed; if the frequency difference is smaller than the first threshold and larger than the second threshold, a second automatic gain control algorithm is performed, wherein the second automatic gain control algorithm uses a current gain setting as a starting point; and if the frequency difference is smaller than both the first and second thresholds, the current gain setting is used as the target gain setting.