Patents by Inventor Kuan-Ta Chen

Kuan-Ta Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240293878
    Abstract: A fixing device for a rotary shaft of a milling head includes an outer washer, an inner washer, and a locking unit. The outer washer is mounted between a housing and a first shaft, and includes an outer peripheral surface, an inner peripheral surface, and detent holes. Each detent hole is defined by a conical surface that has a bottom side portion and a top side portion. The inner washer is mounted between the outer washer and the first shaft. The locking unit includes fastening holes and adjusting members corresponding in position to the detent holes. Each adjusting member has a threaded section engaging threadedly with a corresponding fastening hole, and a conical section connected to the threaded section. The conical section has a conical pressuring surface that presses against the bottom side portion.
    Type: Application
    Filed: March 1, 2024
    Publication date: September 5, 2024
    Applicant: Hold Well Industrial Co., Ltd.
    Inventors: Kuan-Ta CHEN, Sing-Yu Chen
  • Publication number: 20240293902
    Abstract: A waterproof rotary milling head includes a fixed unit, a rotating unit, at least one bearing unit, and a waterproof unit. The rotating unit is rotatable relative to the fixed unit, and the fixed unit and the rotating unit have a gap therebetween. The at least one bearing unit is disposed between the fixed unit and the rotating unit, and provides smooth rotation of the rotating unit relative to the fixed unit. The waterproof unit has an inner guiding conical surface that is disposed outside the at least one bearing unit and that is adjacent to the gap.
    Type: Application
    Filed: March 1, 2024
    Publication date: September 5, 2024
    Applicant: Hold Well Industrial Co., Ltd.
    Inventors: Kuan-Ta CHEN, Sing-Yu Chen
  • Publication number: 20240211673
    Abstract: A method for designing an integrated circuit layout includes: generating an analog standard cell library and designing the integrated circuit layout by using at least the analog standard cell library, where the step of generating the analog standard cell library includes creating a target analog standard cell that is included in the analog standard cell library and does not violate layout rules of digital standard cells. Another method for designing an integrated circuit layout includes: generating a mixed-signal standard cell library and designing the integrated circuit layout by using at least the mixed-signal standard cell library, where the step of generating the mixed-signal standard cell library includes creating a target mixed-signal standard cell that is included in the mixed-signal standard cell library and does not violate layout rules of digital standard cells.
    Type: Application
    Filed: November 28, 2023
    Publication date: June 27, 2024
    Applicant: Mediatek INC.
    Inventors: Pang-Yen Chin, Yu-Sian Lin, Ri-Cheng Zeng, Chi-Shun Cheng, Wei-Hsin Tseng, Kuan-Ta Chen, Chia-Hsin Hu
  • Publication number: 20230412181
    Abstract: A tri-level digital-to-analog converter (DAC) element includes a first DAC cell. The first DAC cell includes a first reference circuit, a second reference circuit, and a switch circuit. The first reference circuit provides a first reference signal. The second reference circuit provides a second reference signal. The first switch circuit receives a control input from an input port of the tri-level DAC element, and controls interconnection between the first reference circuit, the second reference circuit, and an output port of the tri-level DAC element according to the control input. During a period in which the tri-level DAC element operates in a “0” state, the first switch circuit is arranged to couple at least one of the first reference circuit and the second reference circuit to the output port of the tri-level DAC element.
    Type: Application
    Filed: May 16, 2023
    Publication date: December 21, 2023
    Applicant: MEDIATEK INC.
    Inventors: Chuan-Hung Hsiao, SATYA NARAYANA GANTA, Sung-Han Wen, Kuan-Ta Chen
  • Patent number: 11848646
    Abstract: An amplifier circuit includes a voltage-to-current conversion circuit and a current-to-voltage conversion circuit. The voltage-to-current conversion circuit generates a current signal according to an input voltage signal, and includes an operational transconductance amplifier (OTA) used to output the current signal at an output port of the OTA. The current-to-voltage conversion circuit generates an output voltage signal according to the current signal, and includes a linear amplifier (LA), wherein an input port of the LA is coupled to the output port of the OTA, and the output voltage signal is derived from an output signal at an output port of the LA.
    Type: Grant
    Filed: July 5, 2021
    Date of Patent: December 19, 2023
    Assignee: MEDIATEK INC.
    Inventors: Shih-Hsiung Chien, Sung-Han Wen, Kuan-Ta Chen
  • Publication number: 20230378971
    Abstract: A high-speed successive-approximation register analog-to-digital converter (SAR ADC) is shown. A digital-to-analog converter (DAC), a comparator, and a SAR logic circuit are configured to form a loop for successive approximation of a digital representation of an analog input. The SAR logic circuit includes a plurality of latches. Each latch uses a one-gate-delay circuit to wire the comparator to one bit-control terminal of the DAC.
    Type: Application
    Filed: January 20, 2023
    Publication date: November 23, 2023
    Inventors: Pang-Yen CHIN, Wei-Hsin TSENG, Kuan-Ta CHEN
  • Patent number: 11712682
    Abstract: A catalyst is illustrated, which has 70-90 parts by weight of mica, 1-10 parts by weight of zeolite, 5-15 parts by weight of titanium dioxide, 1-10 parts by weight of aluminum oxide, 1-5 parts by weight of sodium oxide and 1-5 parts by weight of potassium oxide. The present disclosure also illustrates a pyrolysis device using the catalyst, and further illustrates a pyrolysis method using the catalyst and/or the pyrolysis device for thermally cracking an organic polymer.
    Type: Grant
    Filed: August 13, 2021
    Date of Patent: August 1, 2023
    Inventors: Kuan-Hsin Chen, Chien-Fa Huang, Kuan-Yu Chen, Kuan-Ta Chen
  • Publication number: 20230231523
    Abstract: The present invention provides an amplifier system including an audio amplifier and a power converter. The audio amplifier is supplied by at least a first supply voltage and a second supply voltage, and the audio amplifier is configured to receive an audio signal to generate an output signal. The power converter includes only one inductor, and is configured to generate the first supply voltage and the second supply voltage according to an input voltage.
    Type: Application
    Filed: December 21, 2022
    Publication date: July 20, 2023
    Applicant: MEDIATEK INC.
    Inventors: Yi-Wei Huang, Sung-Han Wen, Kuan-Ta Chen
  • Publication number: 20230204075
    Abstract: The bearing seat device includes a bearing seat, a bearing set, a driven module, and an adjusting member. The bearing seat has a mounting hole, an adjusting slot, and an inserting hole. The adjusting slot divides a section of the bearing seat that is adjacent to the inserting hole and the mounting hole into a first side compartment and a second side compartment. The inserting hole extends from the first side compartment to the second side compartment. The bearing set is mounted in the mounting hole. The driven module extends into the mounting hole, is supported by the bearing set, and is rotatable relative to the bearing seat. The adjusting member engages the mounting hole and is operable to adjust a width of the adjusting slot between the first and the second side compartments and a diameter of the mounting hole.
    Type: Application
    Filed: December 21, 2022
    Publication date: June 29, 2023
    Applicant: Hold Well Industrial Co., Ltd.
    Inventors: Kuan-Ta CHEN, Shih-Ying HUANG
  • Patent number: 11664774
    Abstract: An operational amplifier includes a single-stage amplifier and a current controller. The single-stage amplifier receives an input signal, and amplifies the input signal to generate an output signal, wherein the single-stage amplifier includes a voltage controlled current source circuit that operates in response to a bias voltage input. The current controller receives the input signal, and generates the bias voltage input according to the input signal. The bias voltage input includes a first bias voltage, a second bias voltage, a third bias voltage, and a fourth bias voltage. None of the first bias voltage, the second bias voltage, the third bias voltage, and the fourth bias voltage is directly set by the input signal of the single-stage amplifier.
    Type: Grant
    Filed: May 3, 2022
    Date of Patent: May 30, 2023
    Assignee: MEDIATEK INC.
    Inventors: Yu-Hung Lin, Kuan-Ta Chen
  • Publication number: 20230078955
    Abstract: The present invention provides a linear amplifier including an amplifier stage, a DC-shifting stage, a compensation network and a power stage. The amplifier stage is configured to generate a first signal and a second signal. The DC-shifting stage is configured to adjust a DC voltage of the first signal and a DC voltage of the second signal to generate an adjusted first signal and an adjusted second signal. The compensation network is configured to generate a first driving signal and a second driving signal according to the first signal, the second signal, the adjusted first signal and the adjusted second signal. The power stage is configured to generate an output signal according to the first driving signal and the second driving signal.
    Type: Application
    Filed: August 10, 2022
    Publication date: March 16, 2023
    Applicant: MEDIATEK INC.
    Inventors: Shih-Hsiung Chien, Sung-Han Wen, Kuan-Ta Chen
  • Patent number: 11451200
    Abstract: A class-D amplifier with low pop-click noise is shown. A loop filter, a control signal generator, a first power driver, and a first feedback circuit are provided within the class-D amplifier to establish a first loop for signal amplification. The class-D amplifier further has a settling circuit and a pre-charging circuit. The settling circuit is configured to be combined with the loop filer and the control signal generator to establish a second loop to settle the loop filter and the control signal generator before the first loop is enabled. The pre-charging circuit is configured to pre-charge a positive output terminal and a negative output terminal of the first power driver.
    Type: Grant
    Filed: December 23, 2020
    Date of Patent: September 20, 2022
    Assignee: MEDIATEK INC.
    Inventors: Fong-Wen Lee, Kuan-Ta Chen
  • Publication number: 20220263480
    Abstract: An operational amplifier includes a single-stage amplifier and a current controller. The single-stage amplifier receives an input signal, and amplifies the input signal to generate an output signal, wherein the single-stage amplifier includes a voltage controlled current source circuit that operates in response to a bias voltage input. The current controller receives the input signal, and generates the bias voltage input according to the input signal. The bias voltage input includes a first bias voltage, a second bias voltage, a third bias voltage, and a fourth bias voltage. None of the first bias voltage, the second bias voltage, the third bias voltage, and the fourth bias voltage is directly set by the input signal of the single-stage amplifier.
    Type: Application
    Filed: May 3, 2022
    Publication date: August 18, 2022
    Applicant: MEDIATEK INC.
    Inventors: Yu-Hung Lin, Kuan-Ta Chen
  • Patent number: 11349443
    Abstract: An operational amplifier includes a single-stage amplifier and a current controller. The single-stage amplifier receives an input signal, and amplifies the input signal to generate an output signal, wherein the single-stage amplifier includes a voltage controlled current source circuit that operates in response to a bias voltage input. The current controller receives the input signal, and generates the bias voltage input according to the input signal.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: May 31, 2022
    Assignee: MEDIATEK INC.
    Inventors: Yu-Hung Lin, Kuan-Ta Chen
  • Patent number: 11309839
    Abstract: A multi-stage amplifier with a high signal-to-noise ratio is introduced. Multiple amplification stages are cascaded between an input terminal and an output terminal of the amplifier. A controller switches the output stage among the multiple amplification stages from a normal mode to an attenuation mode in response to the amplifier input being lower than the threshold. In the attenuation mode, the output stage provides an attenuation resistor coupled in series with the load resistor of the amplifier. Noise is successfully attenuated by the attenuation-mode output stage.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: April 19, 2022
    Assignee: MEDIATEK INC.
    Inventors: Sung-Han Wen, Kuan-Ta Chen
  • Publication number: 20220048012
    Abstract: A catalyst is illustrated, which has 70-90 parts by weight of mica, 1-10 parts by weight of zeolite, 5-15 parts by weight of titanium dioxide, 1-10 parts by weight of aluminum oxide, 1-5 parts by weight of sodium oxide and 1-5 parts by weight of potassium oxide. The present disclosure also illustrates a pyrolysis device using the catalyst, and further illustrates a pyrolysis method using the catalyst and/or the pyrolysis device for thermally cracking an organic polymer.
    Type: Application
    Filed: August 13, 2021
    Publication date: February 17, 2022
    Inventors: KUAN-HSIN CHEN, CHIEN-FA HUANG, KUAN-YU CHEN, KUAN-TA CHEN
  • Publication number: 20220045647
    Abstract: An amplifier circuit includes a voltage-to-current conversion circuit and a current-to-voltage conversion circuit. The voltage-to-current conversion circuit generates a current signal according to an input voltage signal, and includes an operational transconductance amplifier (OTA) used to output the current signal at an output port of the OTA. The current-to-voltage conversion circuit generates an output voltage signal according to the current signal, and includes a linear amplifier (LA), wherein an input port of the LA is coupled to the output port of the OTA, and the output voltage signal is derived from an output signal at an output port of the LA.
    Type: Application
    Filed: July 5, 2021
    Publication date: February 10, 2022
    Applicant: MEDIATEK INC.
    Inventors: Shih-Hsiung Chien, Sung-Han Wen, Kuan-Ta Chen
  • Patent number: 11223117
    Abstract: An electronic package includes: a carrier structure; a first electronic component disposed on the carrier structure; a first insulating layer formed on the carrier structure; a first antenna structure coupled to the first insulating layer and electrically connected to the first electronic component; and a second antenna structure embedded in the carrier structure. As such, the electronic package provides more antenna functions within a limited space so as to improve the signal quality and transmission rate of electronic products. An electronic device having the electronic package is also provided. The electronic device is applicable to an electronic product having an antenna function.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: January 11, 2022
    Assignee: Siliconware Precision Industries Co., Ltd.
    Inventors: Bo-Siang Fang, Kuan-Ta Chen, Chia-Chu Lai, Ying-Wei Lu
  • Patent number: 11205999
    Abstract: The present invention provides an amplifier including a DAC, an analog signal processing circuit, a digital signal processing circuit, a signal detector and a driving stage is disclosed. The DAC is configured to perform a digital-to-analog conversion operation on a digital input signal to generate an analog input signal. The analog signal processing circuit is configured to generate a first processed signal according to the analog input signal and a feedback signal. The digital signal processing circuit is configured to process the digital input signal to generate a second processed signal. The signal detector is configured to detect strength of the digital input signal to generate a mode selection signal. The driving stage is configured to refer to the mode selection signal to receive one of the first processed signal and the second processed signal to generate an output signal, wherein the feedback signal is generated by the output signal.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: December 21, 2021
    Assignee: MEDIATEK INC.
    Inventors: Sung-Han Wen, Kuan-Ta Chen
  • Patent number: 11193972
    Abstract: An inspection equipment is used for inspecting an antenna, and includes a testing device having a first circuit structure, a carrier, a supporting part and a second circuit structure detachably stacked on one another sequentially. Therefore, the carrier, the first circuit structure, the second circuit structure or the supporting part can be detached when different devices under test are inspected, without replacing the whole testing device, thereby achieving effects of modular replacing and cost saving.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: December 7, 2021
    Assignee: Siliconware Precision Industries Co., Ltd.
    Inventors: Bo-Siang Fang, Kuan-Ta Chen, Hsinjou Lin