Patents Assigned to Anpec Electronics Corporation
  • Audio control circuit
    Patent number: 10312879
    Abstract: An audio control circuit is provided in the present disclosure. The audio control circuit includes an input module, a volume signal detecting module and a volume adjusting module. The input module is used for receiving an audio signal. The volume signal detecting module is used for receiving a volume control signal and generates a volume adjusting signal according to the volume control signal. The volume adjusting module is used for receiving the audio signal and the volume adjusting signals and generates an amplified audio signal according to the audio signal and the volume adjusting signal. The volume control signal is a pulse width modulation signal.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: June 4, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventor: Che-Chang Chang
  • Voltage converter for simulating inductor current control
    Patent number: 10312806
    Abstract: The present disclosure provides a voltage converter for simulating inductor current control, which simulates an inductor current of a power level circuit according to operation signals generated by a control circuit, an input voltage, and an output voltage, thereby achieving detection of the inductor current by using a non-sensing method. Therefore, compared to a conventional sensing method, the voltage converter of the present disclosure can reduce use of a sensing circuit to reduce costs, and an inductor current ramp generated thereby has no distortion. Accordingly, the voltage converter of the present disclosure can improve the accuracy of inductor current detection.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: June 4, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Chih-Yuan Chen, Zhan-Zhe Huang
  • Switching charging circuit
    Patent number: 10283994
    Abstract: A switching charging circuit works by receiving an input voltage and then correspondingly outputting an output voltage to a battery. Within a standby duration, to assure that there is sufficient voltage provided for turning on switches in a switching circuit alternately when the switching charging circuit works in the charging duration again, a bootstrap capacitor is charged by a supply voltage. When the bootstrap capacitor is charged, a reverse current is generated by the battery and the reverse current flows towards the input end of the switching charging circuit. In addition, by means of the circuit configuration of this switching charging circuit, the reverse current originally flowing towards the input end of the switching charging circuit can flow back to the battery or to a system load.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: May 7, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventor: Chih-Ning Chen
  • Motor diving circuit
    Patent number: 10284124
    Abstract: A motor driving circuit for receiving a control signal to output at least one output current for driving a motor is provided. The motor driving circuit includes an input module, a gain module, an output module, a first slew rate limiting module, and a second slew rate limiting module. The first slew rate limiting module has a first limiting parameter. The second slew rate includes a second limiting parameter. An output current is outputted by the output terminal. When a rising slew rate of the output current is less than a first slew rate value, the first slew rate limiting module does not operate. When the rising slew rate of the output current is greater than the first slew rate value, the motor driving circuit limits the rising slew rate of the output current based on the first limiting parameter of the first slew rate limiting module.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: May 7, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Kun-Min Chen, I-Lin Chiu
  • Phase adjusting device and system
    Patent number: 10274990
    Abstract: A phase adjusting device provided includes a main delay circuit, a first converter, a second converter, a first buck circuit, and a second buck circuit. The main delay circuit receives an input clock signal to generate a main delay signal. The first converter receives the input clock signal to generate a first conversion signal. The second converter is coupled to the main delay circuit to receive the main delay signal and generate a second conversion signal. The first buck circuit is coupled to the first converter to receive the first conversion signal and generate a first buck voltage. The second buck circuit is coupled to the second converter to receive the second conversion signal and generate a second buck voltage. A first phase difference is formed between the main delay signal and the input clock signal.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: April 30, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Yun-Chiang Chang, Fu-Chuan Chen, Yu-Rong Chen
  • Fan driving circuit
    Patent number: 10270376
    Abstract: A fan driving circuit includes a processing module providing a fan phase signal and a speed signal providing module electrically connected to the processing module and including a first switch having a first terminal, a second terminal receiving the fan phase signal and a third terminal electrically connected to a ground voltage, a second switch having a first terminal electrically connected to a speed signal providing terminal of the fan driving circuit and a first terminal of a first impedance, a second terminal electrically connected to a second terminal of the first impedance and a terminal of a diode, and a third terminal electrically connected to the first terminal of the first switch, and a third switch having a terminal electrically connected to a bias voltage.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: April 23, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Kun-Min Chen, Che-Ming Hsu
  • Error elimination amplifier and motor control circuit using the same
    Patent number: 10224909
    Abstract: Disclosed are an error elimination amplifier and a motor control circuit using the same. The error elimination amplifier includes an amplification circuit, a switching circuit, a comparison circuit, an output comparator and a calibration circuit. The comparison circuit includes a first comparator and a second comparator. The switching circuit and the first input end of the output comparator are electrically connected to a signal output end of the amplification circuit. A second input end of the output comparator is coupled to a reference voltage. The calibration circuit is electrically connected to the amplification circuit. An offset of the amplifier is eliminated through the amplification circuit, the switching circuit and the calibration circuit.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: March 5, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Ming-Jung Tsai, Kun-Min Chen
  • LED fault detection circuit and LED control circuit using the same
    Patent number: 10219348
    Abstract: Disclosed is an LED fault detection circuit, including a current source, a detection resistor and a first circuit, coupled between an LED string and an LED driving circuit. The current source provides a first current. A first end of the detection resistor is coupled to a node between the LED string and the LED driving circuit, and a second end of the detection resistor is coupled to the current source. The first circuit is coupled to the current source and the detection resistor. After the LED string is driven by the LED driving circuit, a detection current flows through the detection resistor. Then, the first circuit generates a fault detection signal according to the sum of the first current and the detection current. As a response, the LED driving circuit stops driving or continues to drive the LED string according to the fault detection signal.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: February 26, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventor: Jui-Chu Chung
  • Switching-type charging circuit capable of quickly dropping the voltage at the input end to zero
    Patent number: 10218195
    Abstract: Disclosed is a switching-type charging circuit including a first switch, a current detection unit, a switching circuit and a control circuit. The current detection unit is connected to the first switch and detects a current flowing through the first switch. The switching circuit is connected to the input end of the switching-type charging circuit through the first switch to receive an input voltage, and correspondingly outputs an output voltage to a battery through an inductor. When the input voltage of the switching-type charging circuit is cut off, an inverse current flowing to the first switch through the switching circuit is generated by the battery, and the control circuit adjusts the working frequency of the switch circuit to make the inverse current lower and become equal to or less than a quiescent current.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: February 26, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventor: Chih-Ning Chen
  • Voltage converter for fast load transient response
    Patent number: 10211735
    Abstract: A voltage converter for fast load transient response adapted for a boost type voltage converter determines whether a transient state occurs, that is, whether a load is converted from a heavy load to a light load, according to a transient detection circuit. When the transient state occurs, an inductive current quickly drops to a corresponding current value to accelerate the rate of an output voltage returning to a stable voltage value, and to shorten a time of load transient response, so as to avoid affecting the performance of a load, especially a sensitive load.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: February 19, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Chih-Yuan Chen, Zhan-Zhe Huang
  • Motor control system and motor driving circuit
    Patent number: 10186993
    Abstract: A motor control system includes a motor driving circuit and a motor. The motor driving circuit includes a control module, a PWM signal detecting module, a transient state detecting module and a driving module. The PWM signal detecting module is electrically connected to the control module to receive a PWM signal and to convert the PWM signal into a first digital PWM control signal. The transient state detecting module provides a second digital PWM control signal to the control module according to the first digital PWM control signal at a first time point and the first digital PWM control signal at a second time point. The driving module receives at least one driving signal from the control module. The control module determines whether to turn off a low side switch of the driving module according to the second digital PWM control signal.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: January 22, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Kun-Min Chen, I-Lin Chiu
  • Detection device and detection method of rotor position of three-phase motor
    Patent number: 10181773
    Abstract: A detection device and a detection method of a rotor position of three-phase motor are disclosed which measure induced voltages under different voltage vectors and calculate an induced voltage relationship among the different induced voltages. Then the detection device and the detection method find out the rotor position suitable for the induced voltage relationship according to a rotor position table. Therefore, the detection device and the detection method can accurately detect the rotor position in a standstill state to prevent the three-phase motor from operating abnormally and burning out.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: January 15, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventor: Yi-Cheng Liu
  • Motor driving circuit
    Patent number: 10171016
    Abstract: A motor driving circuit includes a first output switch, a second output switch, a first adjusting module, and a second adjusting module. A rising slew rate of the first output current along the first direction is adjusted according to the first adjusting parameter of the first adjusting module. A falling slew rate of the first output current along the first direction is adjusted according to the second adjusting parameter of the second adjusting module.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: January 1, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Kun-Min Chen, I-Lin Chiu
  • Self-adaptive startup compensation device
    Patent number: 10168726
    Abstract: The present disclosure provides a self-adaptive startup compensation device. The self-adaptive startup compensation device provides an operational transconductance amplifier that outputs a bias current to the error amplifier of the negative feedback loop of the DC-to-DC converter in such a manner that the error amplifier adjusts the error amplifier signal to be outputted, thereby adjusting the compensation signal generated by the negative feedback loop during a startup period.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: January 1, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Chih-Ning Chen, Chun-Kai Hsu
  • Motor control system and motor control method
    Patent number: 10164561
    Abstract: A motor control system is provided in the present disclosure. The motor control system includes a motor and a control module providing a control signal for driving the motor. The control system includes a processing module, a duty cycle detecting module for receiving a PWM signal from a system, a speed detecting module for providing a speed signal of the motor, a setting module for setting a configuration of the control module. The processing module adjusts the control signal to drive the motor based on a duty cycle value, a speed and a configuration value.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: December 25, 2018
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Chien-Lun Chu, Ching-Feng Lai
  • Motor and motor control method
    Patent number: 10164554
    Abstract: Disclosed is a motor. The motor is electrically connected to a control module. The motor includes a stator and a rotor. The stator includes a first stator module and a second stator module. The first stator module is configured beside the second stator module. A mechanical phase converting line is defined as a center position between the first stator module and the second stator module. The rotor is configured around the stator. The first phase detector is configured at one side of the mechanical phase converting line, and the first phase detector and the first stator module are configured at the same side of the mechanical phase converting line.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: December 25, 2018
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Chien-Lun Chu, Ching-Feng Lai
  • Fan control circuit and fan control method
    Patent number: 10161384
    Abstract: A fan control circuit for controlling a fan includes a processing module, a driving module and a speed compensation module. The driving module is electrically connected to the processing module, and generates at least one driving signal to drive the fan. The speed compensation module is electrically connected to the processing module, and receives a first voltage. The first voltage is variable. The speed compensation module generates and transmits a speed-compensation parameter to the processing module according to the first voltage and a first waveform, and the processing module adjusts the driving signal according to the speed-compensation parameter.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: December 25, 2018
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Chia-Tai Yang, Yin-Kai Chen, Ching-Feng Lai
  • Control apparatus for eliminating magnetizing error of rotor in DC motor and method thereof
    Patent number: 10164556
    Abstract: A control apparatus for eliminating a magnetizing error of a rotor in a DC motor and a method thereof. The rotor in the DC motor is provided with 2N magnetic pole positions disposed therein for phase switching, where N is a positive integer no less than 1. The control apparatus includes a phase detector, at least one counter, a PWM signal generator, control circuit and a full-bridge driving circuit. The phase detector detects changes of states of the magnetic pole positions of the rotor to generate a periodic phase-switching signal. The counter counts a count value associated with each of the magnetic pole positions, respectively. The PWM signal generator periodically outputs 2N PWM signals and adjusts each of the PWM signals issued in a next cycle, respectively, according to the count value associated with each of the magnetic pole positions received in a current cycle.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: December 25, 2018
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventor: Ming-Jung Tsai
  • Constant on-time switching converter and clock synchronization circuit
    Patent number: 10128737
    Abstract: A constant on-time switching converter and a clock synchronization circuit are provided, which generate a synchronization signal according to a clock signal, an input voltage, and an output voltage. The synchronization signal will be synchronized with a period length of the clock signal, thereby acquiring the duty cycle of the constant on-time switching converter. People in the business can accordingly avoid the interference with the synchronization signal and other major clock signals, to prevent electromagnetic interference (BMI) generation.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: November 13, 2018
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Chih-Yuan Chen, Zhan-Zhe Huang
  • LED display device
    Patent number: 10120634
    Abstract: The present disclosure provides an LED display device. The LED display device divides each of LED modules into a plurality of unit blocks. In each of the unit blocks, a display controller transmits image data to be processed in parallel to the corresponding data driver at the same time, and transmits logic signals to the corresponding gate driver, thereby driving the corresponding data driver and then turning on the corresponding LEDs. Therefore, the speed processing the image data of each unit block can be improved, to enhance the visual refresh rate.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: November 6, 2018
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventor: Hung-Ping Lee