Patents Assigned to Realtek Semiconductor Corp.
  • Publication number: 20210166598
    Abstract: A signal processing method for maintaining a signal relative relationship and an electronic device thereof are provided. The signal processing method includes: detecting that a current input period of a vertical synchronization signal changes relative to a previous input period; determining whether a frequency difference between a pulse width modulation signal and the vertical synchronization signal is within an acceptable range, and when the frequency difference is not within the acceptable range, performing a frequency adjustment stage to adjust a period of the pulse width modulation signal to be close to the current input period; selectively performing a phase adjustment stage to adjust a phase of the pulse width modulation signal to a phase of the vertical synchronization signal; and maintaining a relative phase relationship between the pulse width modulation signal and the vertical synchronization signal.
    Type: Application
    Filed: March 12, 2020
    Publication date: June 3, 2021
    Applicant: REALTEK SEMICONDUCTOR CORP.
    Inventors: Tzu-Min Yeh, Po-Hsien Wu
  • Patent number: 11025856
    Abstract: An emergency alarm control circuit comprising: a processing circuit; and an emergency decoder, coupled to the processing circuit. The processing circuit is active, the emergency decoder is non-active when the emergency alarm control circuit operates in a standby mode. The processing circuit activates the emergency decoder to detect an emergency message for an active time period at least one time in the standby mode, and de-activates the emergency decoder when the emergency decoder does not receive the emergency message in the standby mode. The emergency alarm control circuit switches to an active mode when the emergency decoder receives the emergency message in the standby mode, and the processing circuit controls an emergency alarm system to generate an emergency alarm in the active mode.
    Type: Grant
    Filed: October 20, 2019
    Date of Patent: June 1, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventor: Chi-Te Wang
  • Publication number: 20210158817
    Abstract: A dynamic speech recognition method includes performing a first stage: detecting sound data by using a digital microphone and storing the sound data in a first memory, generating a human voice detection signal in response to detecting a human voice from the sound data, and determining to selectively perform a second stage or a third stage according to a total effective data volume, a transmission bit rate of the digital microphone and a recognition interval time. In the second stage, the first processing circuit outputs a first command to a second processing circuit, and the second processing circuit instructs a memory access circuit to operate. In the third stage, the first processing circuit outputs a second command to the second processing circuit, and the second processing circuit instructs the memory access circuit to operate, and the second processing circuit determines whether the speech data matches a predetermined speech command.
    Type: Application
    Filed: July 29, 2020
    Publication date: May 27, 2021
    Applicant: REALTEK SEMICONDUCTOR CORP.
    Inventors: Mei-Hua Wang, Ching-Lung Chen
  • Patent number: 11018634
    Abstract: A circuit includes a digital-to-analog conversion circuit, an amplifying circuit, a mixing circuit, and an analog-to-digital converter. The digital-to-analog conversion circuit is configured to receive and convert audio data in the digital domain and output audio data in the analog domain. The audio data includes a main-tone component. The amplifying circuit is configured to output an audio signal according to the audio data in the analog domain. The mixing circuit is configured to eliminate the main-tone component according to the audio data in the analog domain and the audio signal and to output a feedback signal. The analog-to-digital converter is configured to convert the feedback signal from the analog domain to the digital domain.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: May 25, 2021
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventor: Chih-Kang Chien
  • Patent number: 11018801
    Abstract: A method for performing bit level management in a wireless local area network (WLAN) system, transmitter and receiver are provided. The method includes: calculating respective bit counts of one or more padding fields located in one or more locations within a packet in a transmitter within the WLAN system, respectively; and according to the respective bit counts of the one or more padding field, filling one or more sets of valid data corresponding to at least one predetermined bit count into the one or more padding fields, to replace one or more sets of redundant data. In addition, when a receiver within the WLAN system receives the packet that has the one or more sets of valid data, the WLAN system utilizes the one or more sets of valid data to enhance overall performance of the WLAN system.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: May 25, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventors: Chung-Yao Chang, Wen-Yung Lee
  • Patent number: 11019669
    Abstract: A transmitting-end Bluetooth device and a receiving-end Bluetooth device of a Bluetooth communication system is disclosed. The transmitting-end Bluetooth device is arranged to operably insert an auto-pairing request and a source Bluetooth device address into one or more target packets when the transmitting-end Bluetooth device wants to initiate a Bluetooth auto-pairing procedure, and arranged to operably transmit the one or more target packets when operating under a transmitting-end predetermined operating mode. The receiving-end Bluetooth device is arranged to operably receive the one or more target packets when operating under a receiving-end predetermined operating mode, and to parse the one or more target packets to extract the auto-pairing request and the source Bluetooth device address from the one or more target packets.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: May 25, 2021
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventor: Yu-Hsuan Liu
  • Patent number: 11018925
    Abstract: An apparatus for use in a polar transmitter to perform distortion estimation and compensation is provided. The apparatus includes a mixing unit, a signal processing unit, an estimation unit and a compensation unit. The mixing unit is configured to mix a test output signal and a frequency down-converting signal to generate a mixed signal. The processing unit is configured to perform signal processing on the mixed signal to generate a processed signal. The estimation unit is configured to perform distortion estimation on the processed signal to generate a distortion estimation result. The compensation unit is configured to perform pre-distortion compensation on input signals of the polar transmitter according to the distortion estimation result.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: May 25, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventors: Yuan-Shuo Chang, Yi-Chang Shih, Chih-Wei Lai
  • Publication number: 20210152128
    Abstract: A circuit includes an input impedance, an operational amplifier, a voltage-adjusting circuit, a pulse-generating circuit, and a drive circuit. The input impedance is coupled to an input terminal of the operational amplifier, receives an input voltage, and outputs an input current. The operational amplifier is coupled to a first power voltage and outputs an amplified signal according to an input operating voltage and a feedback signal. The voltage-adjusting circuit adjusts the input operating voltage of the operational amplifier. The pulse-generating circuit generates a pulse width modulation signal according to the amplified signal. The drive circuit is coupled to a second power voltage and generates a driving signal according to the pulse width modulation signal. The feedback signal is correlated with the driving signal.
    Type: Application
    Filed: November 17, 2020
    Publication date: May 20, 2021
    Applicant: REALTEK SEMICONDUCTOR CORP.
    Inventors: Che-Hung Lin, You-Min Lai, Kok-Choon Cheng, Li-Lung Kao
  • Patent number: 11012167
    Abstract: A receiving device comprises a first receiving circuit, for receiving a plurality of signals and comparing a plurality of signal powers of the plurality of signals with a first threshold, to generate a first plurality of comparison results; a second receiving circuit, for receiving the plurality of signals and comparing the plurality of signal powers of the plurality of signals with a second threshold, to generate a second plurality of comparison results, wherein the first threshold is smaller than the second threshold; and a control circuit, coupled to the first receiving circuit and the second receiving circuit, for determining whether an average signal power of the plurality of signals is greater than a reference power according to the first plurality of comparison results and the second plurality of comparison results, to generate a determination result.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: May 18, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventors: Chao-Huang Wu, Han-Chang Kang, Ka-Un Chan
  • Patent number: 11010869
    Abstract: The present invention provides an image processing circuit, wherein the image processing circuit comprises a receiving circuit, an image dividing circuit, a first image enlargement circuit, a second image enlargement circuit and an output circuit. In the operations of the image processing circuit, the receiving circuit receives image data, the image dividing circuit divides a pixel value of each pixel of the image data into two parts to generate first image data and second image data, the first image enlargement circuit enlarges the first image data in a linear manner to generate enlarged first image data, the second image enlargement circuit enlarges the second image data in a non-linear manner to generate enlarged second image data, and the output circuit generates an output image according to the enlarged first image data and the enlarged second image data.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: May 18, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventor: Yu-Shiang Huang
  • Patent number: 11010162
    Abstract: An electronic device can execute instructions, comprising: a processing circuit; a first storage device, coupled to the processing circuit, configured to store at least one instruction and first operation data; and a second storage device, coupled to the processing circuit. The processing circuit reads at least one of the instruction and the first operation data corresponding to the read instruction from the first storage device, and the second storage device does not store the first operation data corresponding to the read instruction, the processing circuit backs up the read first operation data to the second storage device.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: May 18, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventor: Yen-Ju Lu
  • Patent number: 11012061
    Abstract: A circuit includes a core circuit configured to receive an input clock and output and output clock in accordance with a control signal, the core circuit having an encoder configured to encode the control signal into a plurality of control words and a plurality of duty cycle correction buffers configured in a cascade topology and controlled by said plurality of control words, respectively; a duty cycle detection circuit configured to output a logical signal in accordance with a comparison of a duty cycle of the output clock with a target value; and a controller configured to output the control signal in accordance with the logical signal.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: May 18, 2021
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventor: Chia-Liang (Leon) Lin
  • Patent number: 11004589
    Abstract: A device having a substrate, a dielectric slab attached upon the substrate, a coil including a plurality of metal segments laid out on a first metal layer secured by the dielectric slab, the coil being substantially laterally symmetrical with respect to a central line from a top view perspective, and a shield laid out on a second metal layer secured by the dielectric slab and configured in a tree topology. The shield is substantially laterally symmetrical with respect to the central line from the top view perspective, the tree topology including a plurality of clusters of branches, wherein each of said plurality of clusters of branches is associated with a respective metal segment of the coil and includes a primary branch and at least one set of secondary branches that are branched from the primary branch, parallel to one another, and oriented at a substantially forty-five-degree angle with respect to the respective metal segment from the top view perspective.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: May 11, 2021
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventors: Chia-Liang (Leon) Lin, I-Chang Wu, Fei Song
  • Patent number: 11005502
    Abstract: An iterative decoding circuit is provided. The iterative decoding circuit includes a first concatenated decoding circuit, a second concatenated decoding circuit, and a comparator. The first concatenated decoding circuit includes a first convolutional decoder, a first deinterleaver, and a first block decoder. The second concatenated decoding circuit is coupled to the first concatenated decoding circuit, and the second concatenated decoding circuit includes a second convolutional decoder, a second deinterleaver, and a second block decoder. The comparator receives a first convolutional decoding result corresponding to a first convolutional decoding operation and a second convolutional decoding result of a second convolutional decoding operation, and is configured to compare the first convolutional decoding result with the second convolutional decoding result to generate a comparing result. The second block decoder obtains an erasure address information according to the comparing result.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: May 11, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventor: Che-Chia Chang
  • Patent number: 11006203
    Abstract: The present invention provides a wireless earphone, wherein the wireless earphone includes a first pin, a microprocessor and a power management unit, the first pin is arranged to connect to an external charging device, the microprocessor includes a core circuit and a wakeup circuit coupled to the first pin, and the power management unit includes an uninterruptible power area for providing a power to the wakeup circuit. In the operations of the wireless earphone, when the core circuit is at a sleep mode, if the wakeup circuit detects that a voltage level of the first pin changes, the wakeup circuit generates a wakeup signal to wake up the core circuit.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: May 11, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventor: Chih-Hsiang Shen
  • Patent number: 11005473
    Abstract: The present invention provides a voltage difference measurement circuit comprising a level shifting circuit, an ADC and a calculation circuit. In the operations of the voltage difference measurement circuit, the level shifting circuit adjusts levels of a supply voltage and a ground voltage to generate an adjusted supply voltage and an adjusted ground voltage, respectively. The ADC performs an analog-to-digital converting operation upon the adjusted supply voltage and the adjusted ground voltage to generate a first digital value and a second digital value, respectively. The calculation circuit calculates a voltage difference between the supply voltage and the ground voltage according to the first digital value and the second digital value.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: May 11, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventors: Shih-Hsiung Huang, Liang-Huan Lei, Liang-Wei Huang
  • Patent number: 11005467
    Abstract: A method operates by receiving a first voltage, which is a logical signal; converting the first voltage into a second voltage using a first inverting buffer with a first pull-up resistance and a first pull-down resistance; and converting the second voltage into a third voltage using a second inverting buffer with a second pull-up resistance and a second pull-down resistance, wherein: the first pull-up resistance, the first pull-down resistance, the second pull-up resistance, the second pull-down resistance are all tunable, and a difference between the first pull-up resistance and the first pull-down resistance is approximately equal to a difference between the second pull-down resistance and the second pull-up resistance.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: May 11, 2021
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventor: Chia-Liang (Leon) Lin
  • Publication number: 20210136551
    Abstract: A multi-member Bluetooth device for communicating data with a source Bluetooth device, wherein the source Bluetooth device acts as a master in a first piconet. The multi-member Bluetooth device includes a main Bluetooth circuit and an auxiliary Bluetooth circuit. The main Bluetooth circuit acts as a slave in the first piconet, and acts as a master in a second piconet. The auxiliary Bluetooth circuit acts as a slave in the second piconet. The main Bluetooth circuit generates a first slave clock and a second main clock synchronized with a first main clock generated by the source Bluetooth device, and samples a first audio data to be playback. The auxiliary Bluetooth circuit generates a second slave clock and a third slave clock synchronized with the second main clock, and samples a second audio data to be playback.
    Type: Application
    Filed: October 27, 2020
    Publication date: May 6, 2021
    Applicant: Realtek Semiconductor Corp.
    Inventors: Hung-Chuan CHANG, Yi-Cheng CHEN, Kuan-Chung HUANG, Chin-Wen WANG
  • Publication number: 20210136705
    Abstract: A main Bluetooth circuit and an auxiliary Bluetooth circuit of a multi-member Bluetooth device are disclosed. The multi-member Bluetooth device is utilized for communicating data with a source Bluetooth device, and the source Bluetooth device acts as a master in a first piconet. The main Bluetooth circuit acts as a slave in the first piconet, and acts as a master in a second piconet. The auxiliary Bluetooth circuit acts as a slave in the second piconet. The main Bluetooth circuit generates a first slave clock and a second main clock synchronized with a first main clock generated by the source Bluetooth device, and samples a first audio data to be playback. The auxiliary Bluetooth circuit generates a second slave clock and a third slave clock synchronized with the second main clock, and samples a second audio data to be playback.
    Type: Application
    Filed: October 27, 2020
    Publication date: May 6, 2021
    Applicant: Realtek Semiconductor Corp.
    Inventors: Hung-Chuan CHANG, Yi-Cheng CHEN, Kuan-Chung HUANG, Chin-Wen WANG
  • Publication number: 20210136322
    Abstract: A video transmission method and a system thereof are provided. The video transmission method includes: obtaining a first display timing setting parameter of one or more display devices. A total transmission bandwidth of the display device is calculated according to the first display timing setting parameter, and when the total transmission bandwidth is greater than a maximum transmission bandwidth between a video source and a conversion device, a second display timing setting parameter with a lower bandwidth is generated corresponding to the first display timing setting parameter. The video source transmits a video signal conforming to the second display timing setting parameter to the conversion device. The conversion device converts the second display timing setting parameter of the video signal back to the first display timing setting parameter. The video signal conforming to the first display timing setting parameter is transmitted to the corresponding display device.
    Type: Application
    Filed: April 27, 2020
    Publication date: May 6, 2021
    Applicant: REALTEK SEMICONDUCTOR CORP.
    Inventors: Yue-Cheng Zhao, Cheng-Hua Wu, Chia-Liang Wei, Cheng-Hung Wu