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11.发明授权公开(公告)号：US11211903B1
公开(公告)日：2021-12-28
申请号：US17087643
申请日：2020-11-03
Inventor： Ya-Mien Hsu , Deng-Yao Shih , Yang-Jing Huang
Abstract: An over charge protection method applied to a voltage converter which can operate in a quaternary modulation mode (Q mode) or a ternary modulation mode (T mode). The over charge protection method comprises: (a) determining whether the voltage converter operates in the Q mode or the T mode; and (b) setting a current threshold of the voltage converter to a first over current threshold if the voltage converter operates in the T mode; and (c) setting the current threshold to a second over current threshold if the voltage converter operates in the Q mode, wherein the first current threshold is smaller than the second over current threshold.
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公开(公告)号：US12237834B1
公开(公告)日：2025-02-25
申请号：US18377372
申请日：2023-10-06
Inventor： Isaac Y. Chen , Chih-Sheng Chang
IPC: H03K17/08 , G01R19/165 , G05F3/26 , H03K3/023 , H03K5/22 , H03K17/567 , H03K19/0175 , H03K19/20
Abstract: An electronic device and a method for overcurrent detection are disclosed herein. The electronic device causes a high-side offsetting voltage drop and converts a voltage difference between a first voltage at an input terminal of an upper-bridge power component of a power stage and a sum of a first balancing voltage drop and the high-side offsetting voltage drop into a first current. The electronic device further converts a voltage difference between a second voltage of an output terminal of the upper-bridge power component and a second balancing voltage drop into a second current, compares the first current and the second current, and generates a high-side overcurrent protection (OCP) signal with logic high for a driver of the power stage when the first current is stronger than the second current, such that the driver turns off the upper-bridge power component accordingly.
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公开(公告)号：US20240406624A1
公开(公告)日：2024-12-05
申请号：US18326032
申请日：2023-05-31
Inventor： JUNG-KUEI CHANG , WUN-LONG YU
Abstract: A loudspeaker excursion prediction system, which is suitable for a loudspeaker protection circuit comprises a low-pass filter circuit, a down-sampling circuit, and an impulse response generation unit. The low-pass filter circuit is configured to generate an audio signal XLPF(t) passing through the low-pass filter circuit according to an audio signal X(t) with a first sampling frequency. A down-sampling circuit, coupled to the low-pass filter circuit, is configured to down-sampling the first sampling frequency of the audio signal XLPF(t) output from the low-pass filter circuit to a second sampling frequency, so as to generate a down-sampled audio signal XLPFDN(t). The impulse response generation unit, coupled to the down-sampling circuit, is configured to generate an excursion prediction value according to a loudspeaker excursion transfer function and the down-sampled audio signal XLPFDN(t).
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14.发明公开公开(公告)号：US20240348186A1
公开(公告)日：2024-10-17
申请号：US18134033
申请日：2023-04-12
Inventor： Ru-Chang Wu
IPC: H02P23/14 , H02P25/022
CPC classification number: H02P23/14 , H02P25/022
Abstract: A method for estimating a rotor angle and a rotor speed of a permanent magnet synchronous motor (PMSM) includes: receiving a d-axis voltage driving signal of the PMSM, and obtaining a first estimated rotor speed of the PMSM according to the d-axis voltage driving signal; receiving a speed command, and obtaining a second estimated rotor speed of the PMSM according to the speed command; performing a weighting adjustment operation upon the first estimated rotor speed and the second estimated rotor speed to obtain a third estimated rotor speed for estimating the rotor speed of the PMSM; and performing an integration operation upon the third estimated rotor speed to obtain an estimated rotor angle for estimating the rotor angle of the PMSM.
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公开(公告)号：US20240272616A1
公开(公告)日：2024-08-15
申请号：US18110340
申请日：2023-02-15
Inventor： Ming-Fu Tsai , Sheng-Hung Hsu
IPC: G05B19/4155
CPC classification number: G05B19/4155 , G05B2219/34013
Abstract: A control method applied to a servomotor, wherein the servomotor includes a motor, and the control method includes: setting a mode of the servomotor as a predetermined mode corresponding to a predetermined communication protocol; receiving an input signal from a controller for controlling the motor, wherein the controller is coupled to the servomotor; and switching the mode of the servomotor from the predetermined mode to one of a plurality of candidate modes according to a frequency of the input signal.
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Patent Agency Ranking
公开(公告)号：US12015348B2
公开(公告)日：2024-06-18
申请号：US17892154
申请日：2022-08-22
Inventor： Yao-Ren Chang
IPC: H02M3/158
CPC classification number: H02M3/158
Abstract: A control circuit for adaptive noise margin control for a constant on time (COT) converter comprises an input reference terminal, amplifier, first switch device, voltage divider, trigger circuit, and output reference terminal. The amplifier has an input terminal coupled to the input reference terminal receiving a reference voltage signal. The first switch device has a control terminal coupled to an output of the amplifier, a first conduction terminal for receiving a voltage source signal, and a second conduction terminal. The voltage divider is coupled to the second conduction terminal and another input terminal of the amplifier. The trigger circuit, coupled to the voltage divider, is for triggering voltage change of a modified reference voltage signal selectively according to a high-side control signal of the COT converter. The output reference terminal coupled to the second conduction terminal outputs the modified reference voltage signal.
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公开(公告)号：US20230170903A1
公开(公告)日：2023-06-01
申请号：US17535725
申请日：2021-11-26
Inventor： SHU-HAN NIEN
IPC: H03K19/003 , H03K19/00
CPC classification number: H03K19/00384 , H03K19/0027 , G11C7/1084
Abstract: A digital buffer device with self-calibration includes a first buffer circuit, detection circuit, and calibration circuit. The first buffer circuit has a buffer input terminal for receiving an input signal and a buffer output terminal as output of the digital buffer device. The detection circuit includes at least one second buffer circuit for receiving at least one reference signal and generating at least one detection signal to indicate circuit characteristic variations of the at least one second buffer circuit. The at least one second buffer circuit is of a same type of buffer as the first buffer circuit. The calibration circuit has a calibration input terminal for receiving the input signal, and a calibration output terminal coupled to the buffer output terminal. The calibration circuit is for calibrating the first buffer circuit to generate an output signal according to the input signal and the at least one detection signal.
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公开(公告)号：US20230114056A1
公开(公告)日：2023-04-13
申请号：US17494855
申请日：2021-10-06
Inventor： Shih-Chieh Wang , Yong-Yi Jhuang , Ming-Fu Tsai
IPC: H02P6/18
Abstract: A method for determining an initial rotor position of a permanent magnet synchronous motor (PMSM) includes: generating a plurality of transient currents by applying a plurality of voltages to each phase stator winding of a three phase stator winding of the PMSM; generating three phase current differences according to the plurality of transient currents; determining a first zone in which the initial rotor position of the PMSM is located according to the three phase current differences, wherein angles between 0-360 degrees are divided into a plurality of zones, and the first zone is selected from the plurality of zones; calculating three line current differences according to the three phase current differences; and determining the initial rotor position of the PMSM according to the first zone and the three line current differences.
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公开(公告)号：US20230057897A1
公开(公告)日：2023-02-23
申请号：US17406121
申请日：2021-08-19
Inventor： TSE-HUA YAO
IPC: G01R31/68 , G01R1/067 , H01L23/525
Abstract: A semiconductor device with contact check circuitry is provided. The semiconductor device includes a plurality of pads, an internal circuit, and a contact check circuit. The plurality of pads includes a first pad and a second pad. The internal circuit is coupled to the plurality of pads. The contact check circuit, at least coupled to the first pad and the second pad, is used for checking, when the semiconductor device is under test, contact connections to the first pad and the second pad to generate a check result signal according to comparison of a first test signal and a second test signal received from the first pad and the second pad with at least one reference signal.
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公开(公告)号：US11545200B1
公开(公告)日：2023-01-03
申请号：US17498773
申请日：2021-10-12
Inventor： Po-Hsun Wu , Jen-Shou Hsu
Abstract: A data control circuit includes a first latch circuit, a self-block circuit, a second latch circuit, a third latch circuit, a first data timing-labeled signal generating circuit, and a second data timing-labeled signal generating circuit. The first latch circuit is arranged to receive a data window signal. The self-block circuit is coupled to the first latch circuit, and is arranged to generate a protection signal. The second latch circuit is coupled to the self-block circuit, and is arranged to output a first data timing-labeled signal. The third latch circuit is coupled to the second latch circuit, and is arranged to generate a second data timing-labeled signal. The first data timing-labeled signal generating circuit is arranged to generate a third data timing-labeled signal. The second data timing-labeled signal generating circuit is arranged to generate a fourth data timing-labeled signal.
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