-
公开(公告)号：US11594964B2
公开(公告)日：2023-02-28
申请号：US17109087
申请日：2020-12-01
Applicant: SYNAPTICS INCORPORATED
Inventor： Jae Won Choi , Dan Shen , Balakishan Challa , Lorenzo Crespi , Ketankumar B. Patel
Abstract: A circuit includes a controller circuit configured to receive an output voltage of a converter and adjust a switching frequency of the converter in response to a status of an output load and an output load sensing circuit configured to determine the status of the output load and provide the peak current to the controller circuit. The output load sensing circuit may include a first timer configured to provide a delayed first signal to a peak current control in response to the output load being a heavy load. A second timer may be configured to provide a delayed second signal to the peak current control in response to the output load being a light load. The peak current control may be configured to adjust a peak current based on the received first signal and the second signal and configured to provide the peak current to the controller circuit.
-
公开(公告)号：US10333473B1
公开(公告)日：2019-06-25
申请号：US15963972
申请日：2018-04-26
Applicant: SYNAPTICS INCORPORATED
Inventor： Dan Shen , Balakishan Challa , Lorenzo Crespi
Abstract: Systems and methods are provided for improved stability of audio amplifiers that incorporate external speaker connectivity. In one example, a system includes an audio amplifier circuit comprising two or more amplifier stages and a stability resistor and configured to receive an audio input signal, the audio amplifier circuit configured for at least two modes of operation, a first mode having a high input transconductance and the stability resistor is coupled to an output of the audio amplifier circuit, and a second mode having a lower input transconductance and the stability resistor is decoupled from the output of the audio amplifier circuit. The system further includes an amplitude detection circuit configured to provide a signal mode detection signal, an amplifier switching circuit configured to adjust a variable input transconductance of at least one of the amplifier stages, and a load switching circuit configured to couple and decouple the stability resistor at the output of the audio amplifier circuit.
-
公开(公告)号：US20200176978A1
公开(公告)日：2020-06-04
申请号：US16209898
申请日：2018-12-04
Applicant: SYNAPTICS INCORPORATED
Inventor： Dan Shen , Balakishan Challa , Lorenzo Crespi
IPC: H02H9/02
Abstract: Systems and methods are provided for improved stability of driver amplifiers. In one example, a system includes an NMOSFET power device operable to generate a current signal at a drain terminal. The system further includes a current comparison amplifier operable to amplify a difference signal comprising a difference between a replica current signal of the NMOSFET power device and a reference current signal to drive a current comparison amplifier voltage output signal. The system further includes a PMOSFET clamp device comprising a source terminal coupled to a gate terminal of the NMOSFET power device operable to limit a voltage at the gate terminal of the NMOSFET power device responsive to the current comparison amplifier voltage output signal.
-
公开(公告)号：US11816919B2
公开(公告)日：2023-11-14
申请号：US18053205
申请日：2022-11-07
Applicant: Synaptics Incorporated
Inventor： Lorenzo Crespi , Ketankumar Balubhai Patel , Balakishan Challa , Claudio DeBerti , Guozhong Shen
CPC classification number: G06V40/1318 , G01D5/24
Abstract: A silicon sensor device includes: a plurality of metal layers; and a plurality of dielectric layers. Each of the plurality of metal layers is disposed on a respective dielectric layer, and wherein each of the plurality of metal layers is separated from an adjacent metal layer by a respective dielectric layer. The plurality of metal layers include: a first metal layer comprising a plurality of transmitter electrodes and a plurality of receiver electrodes; a second metal layer disposed beneath the first metal layer, wherein the second metal layer comprises a plurality of routing traces for the plurality of transmitter electrodes and a plurality of shielding blocks; and one or more circuit layers disposed beneath the second metal layer. A respective shielding block of the plurality of shielding blocks is configured to shield a respective portion of a respective receiver electrode of the plurality of receiver electrodes.
-
Patent Agency Ranking
公开(公告)号：US20230110873A1
公开(公告)日：2023-04-13
申请号：US18053205
申请日：2022-11-07
Applicant: Synaptics Incorporated
Inventor： Lorenzo Crespi , Ketankumar Balubhai Patel , Balakishan Challa , Claudio DeBerti , Guozhong Shen
Abstract: A silicon sensor device includes: a plurality of metal layers; and a plurality of dielectric layers. Each of the plurality of metal layers is disposed on a respective dielectric layer, and wherein each of the plurality of metal layers is separated from an adjacent metal layer by a respective dielectric layer. The plurality of metal layers include: a first metal layer comprising a plurality of transmitter electrodes and a plurality of receiver electrodes; a second metal layer disposed beneath the first metal layer, wherein the second metal layer comprises a plurality of routing traces for the plurality of transmitter electrodes and a plurality of shielding blocks; and one or more circuit layers disposed beneath the second metal layer. A respective shielding block of the plurality of shielding blocks is configured to shield a respective portion of a respective receiver electrode of the plurality of receiver electrodes.
-
公开(公告)号：US11258250B2
公开(公告)日：2022-02-22
申请号：US16209898
申请日：2018-12-04
Applicant: SYNAPTICS INCORPORATED
Inventor： Dan Shen , Balakishan Challa , Lorenzo Crespi
Abstract: Systems and methods are provided for improved stability of driver amplifiers. In one example, a system includes an NMOSFET power device operable to generate a current signal at a drain terminal. The system further includes a current comparison amplifier operable to amplify a difference signal comprising a difference between a replica current signal of the NMOSFET power device and a reference current signal to drive a current comparison amplifier voltage output signal. The system further includes a PMOSFET clamp device comprising a source terminal coupled to a gate terminal of the NMOSFET power device operable to limit a voltage at the gate terminal of the NMOSFET power device responsive to the current comparison amplifier voltage output signal.
-
公开(公告)号：US11264977B1
公开(公告)日：2022-03-01
申请号：US17184409
申请日：2021-02-24
Applicant: SYNAPTICS INCORPORATED
Inventor： Jae Won Choi , Dan Shen , Balakishan Challa , Lorenzo Crespi , Ketan Patel
IPC: H03K5/1536 , G01R19/175 , H02M1/08 , H02M1/00
Abstract: Embodiments described herein provide a zero-crossing detector (ZCD) for a direct current to direct current (DC-DC) converter. The ZCD includes a ZCD integrator configured to receive a switch voltage and an output voltage of a power stage of the DC-DC converter and to generate a zero-crossing detect signal based, at least in part, on the received switch voltage and output voltage, where the zero-crossing detect signal is configured to indicate an output current in an output inductor of the power stage of the DC-DC converter is approximately zero. The ZCD may also include a ZCD offset calibrator configured to receive the switch voltage and generate a ZCD calibration offset based, at least in part, on the received switch voltage, where the ZCD integrator is configured to generate the zero-crossing detect signal based, at least in part, on the ZCD calibration offset.
-
公开(公告)号：US10965253B2
公开(公告)日：2021-03-30
申请号：US16357244
申请日：2019-03-18
Applicant: SYNAPTICS INCORPORATED
Inventor： Dan Shen , Balakishan Challa , Lorenzo Crespi
Abstract: Systems and methods are provided for improved noise performance of audio amplifiers. In one example, a system includes a multistage amplifier comprising at least a first stage amplifier and a second stage amplifier. The system further includes a plurality of switches disposed within the multistage amplifier to configure the multistage amplifier. The system further includes a control signal configured to control the multistage amplifier to a normal amplification mode or a mute state, wherein the multistage amplifier is adapted to amplify an input signal in the normal amplification mode, the multistage amplifier is adapted to output a zero signal in the mute state, and internal amplification stages of the multistage amplifier are disabled in the mute state, and output stages of each of the at least first stage amplifier and the second stage amplifier are electrically shorted and/or shorted to a fixed bias voltage in the mute state.
-
公开(公告)号：US20200220502A1
公开(公告)日：2020-07-09
申请号：US16357244
申请日：2019-03-18
Applicant: SYNAPTICS INCORPORATED
Inventor： Dan Shen , Balakishan Challa , Lorenzo Crespi
Abstract: Systems and methods are provided for improved noise performance of audio amplifiers. In one example, a system includes a multistage amplifier comprising at least a first stage amplifier and a second stage amplifier. The system further includes a plurality of switches disposed within the multistage amplifier to configure the multistage amplifier. The system further includes a control signal configured to control the multistage amplifier to a normal amplification mode or a mute state, wherein the multistage amplifier is adapted to amplify an input signal in the normal amplification mode, the multistage amplifier is adapted to output a zero signal in the mute state, and internal amplification stages of the multistage amplifier are disabled in the mute state, and output stages of each of the at least first stage amplifier and the second stage amplifier are electrically shorted and/or shorted to a fixed bias voltage in the mute state.
-
-
-
-
-
-
-
-
Search Results
9
records
(took 0.014 seconds)
