公开(公告)号：US11329562B1

公开(公告)日：2022-05-10

申请号：US17092310

申请日：2020-11-08

Applicant: Elite Semiconductor Microelectronics Technology Inc.

Inventor： Che-Wei Hsu

IPC: H02M3/158 ,  H03K5/24 ,  H02M1/08 ,  G01R19/165 ,  H02M1/00

Abstract: A COT (constant on-time) buck converter includes a first transistor, a second transistor, a driver circuit, an inductor, a first resistor, a second resistor, a capacitor, a load, and a feedback loop circuit. The feedback loop circuit includes a first switch, a second switch, an error amplifier, a comparator, a frequency locked loop circuit, an inverter and a COT logic circuit. The COT buck converter is able to improve DC (direct-current) regulation efficiency and transient response time.

公开(公告)号：US11265681B1

公开(公告)日：2022-03-01

申请号：US17133672

申请日：2020-12-24

Applicant: ELITE SEMICONDUCTOR MICROELECTRONICS TECHNOLOGY INC.

Inventor： Chun-Yi Lee ,  Hung-Ta Tso ,  Chun-Chieh Huang

IPC: H04W4/029 ,  H04W4/80 ,  G01S19/26 ,  H04W4/021 ,  H04W84/12

Abstract: An electronic device is capable of determining a radio communications configuration. The electronic device includes a GPS module arranged for receiving an updated GPS coordinate. A controller is electronically coupled to the GPS module, and arranged for controlling the GPS module to receive the updated GPS coordinate and for determining the radio communications configuration based on the updated GPS coordinate received from the GPS module. A transmitter is electronically coupled to the controller and arranged for transmitting a message from the controller according to the determined radio communications configuration.

公开(公告)号：US12237834B1

公开(公告)日：2025-02-25

申请号：US18377372

申请日：2023-10-06

Applicant: Elite Semiconductor Microelectronics Technology Inc.

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.

公开(公告)号：US20240406624A1

公开(公告)日：2024-12-05

申请号：US18326032

申请日：2023-05-31

Applicant: ELITE SEMICONDUCTOR MICROELECTRONICS TECHNOLOGY INC.

Inventor： JUNG-KUEI CHANG ,  WUN-LONG YU

IPC: H04R3/00 ,  H03G3/20 ,  H04R29/00

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).

公开(公告)号：US20240348186A1

公开(公告)日：2024-10-17

申请号：US18134033

申请日：2023-04-12

Applicant: Elite Semiconductor Microelectronics Technology Inc.

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.

公开(公告)号：US20240272616A1

公开(公告)日：2024-08-15

申请号：US18110340

申请日：2023-02-15

Applicant: Elite Semiconductor Microelectronics Technology Inc.

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.

公开(公告)号：US12015348B2

公开(公告)日：2024-06-18

申请号：US17892154

申请日：2022-08-22

Applicant: ELITE SEMICONDUCTOR MICROELECTRONICS TECHNOLOGY INC.

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.

公开(公告)号：US20230170903A1

公开(公告)日：2023-06-01

申请号：US17535725

申请日：2021-11-26

Applicant: ELITE SEMICONDUCTOR MICROELECTRONICS TECHNOLOGY INC.

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.

公开(公告)号：US20230114056A1

公开(公告)日：2023-04-13

申请号：US17494855

申请日：2021-10-06

Applicant: Elite Semiconductor Microelectronics Technology Inc.

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.

公开(公告)号：US20230057897A1

公开(公告)日：2023-02-23

申请号：US17406121

申请日：2021-08-19

Applicant: ELITE SEMICONDUCTOR MICROELECTRONICS TECHNOLOGY INC.

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.