Patents by Inventor Chun-Cheng Liu

Chun-Cheng Liu 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).

  • Patent number: 9847790
    Abstract: A hybrid analog-to-digital converter (ADC) includes a plurality of analog-to-digital conversion circuits and a combining circuit. The analog-to-digital conversion circuits generate a plurality of partial digital outputs for a same analog input, respectively, wherein the analog-to-digital conversion circuits include a digital slope ADC used to perform signal quantization in a time domain. The combining circuit combines the partial digital outputs generated from the analog-to-digital conversion circuits to generate a final digital output of the analog input.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: December 19, 2017
    Assignee: MEDIATEK INC.
    Inventor: Chun-Cheng Liu
  • Publication number: 20170244424
    Abstract: A hybrid analog-to-digital converter (ADC) includes a plurality of analog-to-digital conversion circuits and a combining circuit. The analog-to-digital conversion circuits generate a plurality of partial digital outputs for a same analog input, respectively, wherein the analog-to-digital conversion circuits include a digital slope ADC used to perform signal quantization in a time domain. The combining circuit combines the partial digital outputs generated from the analog-to-digital conversion circuits to generate a final digital output of the analog input.
    Type: Application
    Filed: August 27, 2015
    Publication date: August 24, 2017
    Inventor: Chun-Cheng Liu
  • Publication number: 20170214411
    Abstract: A Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC) including: a comparing module and a calibration circuit. The comparing module is arranged to generate a first comparison result by comparing an input voltage value of the SAR ADC with a first voltage value and a second result by comparing the input voltage value with a second voltage value; the calibration circuit coupled to the comparing module is for generating a determination result determining whether the input voltage value is in a range according to the first comparison result and the second comparison result, and enters a calibration mode according to the determination result.
    Type: Application
    Filed: January 9, 2017
    Publication date: July 27, 2017
    Inventor: Chun-Cheng Liu
  • Publication number: 20160120504
    Abstract: An ultrasonic scanning system includes a host device, an ultrasonic probe, and at least two electrodes. The ultrasonic probe is electrically connected to the host device for performing an ultrasonic scanning operation toward a detecting region to generate a scanning signal and to transmit the scanning signal to the host device. The at least two electrodes are disposed on the ultrasonic probe and are connected to the host device for detecting a physiological signal of the detecting region and transmitting the physiological signal to the host device.
    Type: Application
    Filed: May 21, 2015
    Publication date: May 5, 2016
    Inventor: Chun-Cheng Liu
  • Patent number: 9287891
    Abstract: A SAR ADC is provided. A DAC provides an intermediate analog signal according to an analog input signal, a most significant bit capacitance and a plurality of significant bit capacitances smaller than the most significant bit capacitance. A first switched capacitor array selectively provides the most significant bit capacitance or the significant bit capacitances according to a select signal. Sum of the significant bit capacitances is equal to the most significant bit capacitance. The second switched capacitor array provides the significant bit capacitances when the first switched capacitor array provides the most significant bit capacitance, and provides the most significant bit capacitance when the first switched capacitor array provides the significant bit capacitances. A comparator provides a comparison result according to the intermediate analog signal. A SAR logic provides an digital output signal according to the comparison result.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: March 15, 2016
    Assignee: MEDIATEK INC.
    Inventors: Zwei-Mei Lee, Chun-Cheng Liu
  • Patent number: 9172389
    Abstract: A successive approximation register analog-to-digital converter (SAR ADC) for high-speed applications. The SAR ADC uses at least one set of capacitors. Each set of capacitors is formed by 2M capacitor cells. The set of 2M capacitor cells is allocated into p capacitors C(p?1) to C0 decreasing in capacitance. C(p?1)<C(p?2)+C(p?3)+ . . . +C0, and C(p?1) includes (2M-1?2q) capacitor cells.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: October 27, 2015
    Assignee: MEDIATEK INC.
    Inventor: Chun-Cheng Liu
  • Publication number: 20150194980
    Abstract: A successive approximation register analog-to-digital converter (SAR ADC) for high-speed applications. The SAR ADC uses at least one set of capacitors. Each set of capacitors is formed by 2M capacitor cells. The set of 2M capacitor cells is allocated into p capacitors C(p?1) to C0 decreasing in capacitance. C(p?1)<C(p?2)+C(p?3)+ . . . +C0, and C(p?1) includes (2M-1?2q) capacitor cells.
    Type: Application
    Filed: May 21, 2014
    Publication date: July 9, 2015
    Applicant: MediaTek Inc.
    Inventor: Chun-Cheng LIU
  • Patent number: 8939422
    Abstract: A support device is disclosed. The support device includes a connecting element and a first support frame. The connecting element is used for connecting the support device to a portable electronic device and includes a plurality of positioning protruding points. One end of the first support frame includes a positioning hole used for connecting to one of the plurality of the positioning protruding points; another end of the first support frame contacts a plane so that a clamping angle between the portable electronic device and the plane is formed, and the clamping angle is different if the positioning hole connects to different positioning protruding points.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: January 27, 2015
    Assignee: Wistron Corporation
    Inventors: Chun-Cheng Liu, Yu-Hua Chang
  • Publication number: 20140014802
    Abstract: A support device is disclosed. The support device includes a connecting element and a first support frame. The connecting element is used for connecting the support device to a portable electronic device and includes a plurality of positioning protruding points. One end of the first support frame includes a positioning hole used for connecting to one of the plurality of the positioning protruding points; another end of the first support frame contacts a plane so that a clamping angle between the portable electronic device and the plane is formed, and the clamping angle is different if the positioning hole connects to different positioning protruding points.
    Type: Application
    Filed: September 10, 2012
    Publication date: January 16, 2014
    Inventors: CHUN-CHENG LIU, Yu-Hua Chang
  • Patent number: 8416116
    Abstract: The configurations and adjusting method of a successive approximation analog-to-digital converter (SAR ADC) are provided. The provided SAR ADC includes at least one capacitor with a first and a second terminals, and a plurality of bits, each of which is connected to the at least one capacitor, wherein the first terminal receives an input signal, and the second terminal selectively receives one of a first and a second reference voltages, and a first comparator receiving an adjustable third reference voltage and a first voltage value generated by the input signal, wherein a connection of the second terminal of each the capacitor of the capacitor array is switched when the first voltage value is larger than the third reference voltage.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: April 9, 2013
    Assignee: National Cheng Kung University
    Inventors: Soon-Jyh Chang, Chun-Cheng Liu, Guan-Ying Huang
  • Patent number: 8390501
    Abstract: A successive approximation register (SAR) analog-to-digital converter (ADC) is disclosed. A first and second capacitor DACs receive a first and second input signals respectively. A first coarse comparator compares an output of the first capacitor DAC with a window reference voltage, a second coarse comparator compares an output of the second capacitor DAC with the window reference voltage, and a fine comparator compares the output of the first capacitor DAC with the output of the second capacitor DAC. A SAR controller receives outputs of the first and second coarse comparators to determine whether the outputs of the first and second capacitor DACs are within a predictive window determined by the window reference voltage. The SAR controller bypasses at least one phase of analog-to-digital conversion of the SAR ADC when the outputs of the first capacitor DAC and the second capacitor DAC are determined to be within the predictive window.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: March 5, 2013
    Assignees: NCKU Research and Development Foundation, Himax Technologies Limited, Himax Media Solutions, Inc.
    Inventors: Soon-Jyh Chang, Guan-Ying Huang, Chun-Cheng Liu, Chung-Ming Huang, Jin-Fu Lin, Chih-Haur Huang
  • Patent number: 8385054
    Abstract: A support structure for supporting a computer device includes a clamping frame, two clamping members, and a support rod. The clamping frame is used for clamping a side of the computer device. The two clamping members are disposed on the clamping frame. At least one of the two clamping members has at least one angle positioning bump. The support rod is disposed at a side of the clamping frame for supporting the clamping frame. The support rod includes an arm portion and a shaft portion. The arm portion has an angle positioning hole for engaging with the angle positioning bump to fix an angle of the arm portion relative to the clamping frame. The shaft portion is extendedly connected to an end of the arm portion and detachably disposed between the clamping members, for making the arm portion capable of rotating relative to the clamping frame.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: February 26, 2013
    Assignee: Wistron Corporation
    Inventors: Chun-Cheng Liu, Jen-Chieh Cheng
  • Publication number: 20120293931
    Abstract: A support structure for supporting a computer device includes a clamping frame, two clamping members, and a support rod. The clamping frame is used for clamping a side of the computer device. The two clamping members are disposed on the clamping frame. At least one of the two clamping members has at least one angle positioning bump. The support rod is disposed at a side of the clamping frame for supporting the clamping frame. The support rod includes an arm portion and a shaft portion. The arm portion has an angle positioning hole for engaging with the angle positioning bump to fix an angle of the arm portion relative to the clamping frame. The shaft portion is extendedly connected to an end of the arm portion and detachably disposed between the clamping members, for making the arm portion capable of rotating relative to the clamping frame.
    Type: Application
    Filed: June 15, 2011
    Publication date: November 22, 2012
    Inventors: Chun-Cheng Liu, Jen-Chieh Cheng
  • Patent number: 8310388
    Abstract: The configurations and adjusting method of a subrange analog-to-digital converter (ADC) are provided. The provided subrange ADC includes a X.5-bit flash ADC, a Y-bit SAR ADC and a (X+Y)-bit segmented capacitive digital-to-analog converter (DAC).
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: November 13, 2012
    Assignee: National Cheng Kung University
    Inventors: Soon-Jyh Chang, Ying-Zu Lin, Chun-Cheng Liu
  • Publication number: 20120274489
    Abstract: A successive approximation register (SAR) analog-to-digital converter (ADC) is disclosed. A first and second capacitor DACs receive a first and second input signals respectively. A first coarse comparator compares an output of the first capacitor DAC with a window reference voltage, a second coarse comparator compares an output of the second capacitor DAC with the window reference voltage, and a fine comparator compares the output of the first capacitor DAC with the output of the second capacitor DAC. A SAR controller receives outputs of the first and second coarse comparators to determine whether the outputs of the first and second capacitor DACs are within a predictive window determined by the window reference voltage. The SAR controller bypasses at least one phase of analog-to-digital conversion of the SAR ADC when the outputs of the first capacitor DAC and the second capacitor DAC are determined to be within the predictive window.
    Type: Application
    Filed: April 28, 2011
    Publication date: November 1, 2012
    Applicants: NCKU RESEARCH AND DEVELOPMENT FOUNDATION, HIMAX MEDIA SOLUTIONS, INC., HIMAX TECHNOLOGIES LIMITED
    Inventors: Soon-Jyh CHANG, Guan-Ying Huang, Chun-Cheng LIU, CHUNG-MING HUANG, Jin-Fu LIN, Chih-Haur HUANG
  • Publication number: 20120154194
    Abstract: The configurations and adjusting method of a successive approximation analog-to-digital converter (SAR ADC) are provided. The provided SAR ADC includes at least one capacitor with a first and a second terminals, and a plurality of bits, each of which is connected to the at least one capacitor, wherein the first terminal receives an input signal, and the second terminal selectively receives one of a first and a second reference voltages, and a first comparator receiving an adjustable third reference voltage and a first voltage value generated by the input signal, wherein a connection of the second terminal of each the capacitor of the capacitor array is switched when the first voltage value is larger than the third reference voltage.
    Type: Application
    Filed: March 21, 2011
    Publication date: June 21, 2012
    Applicant: NATIONAL CHENG KUNG UNIVERSITY
    Inventors: Soon-Jyh Chang, Chun-Cheng Liu, Guan-Ying Huang
  • Publication number: 20120154193
    Abstract: The configurations and adjusting method of a subrange analog-to-digital converter (ADC) are provided. The provided subrange ADC includes a X.5-bit flash ADC, a Y-bit SAR ADC and a (X+Y)-bit segmented capacitive digital-to-analog converter (DAC).
    Type: Application
    Filed: March 17, 2011
    Publication date: June 21, 2012
    Applicant: NATIONAL CHENG KUNG UNIVERSITY
    Inventors: Soon-Jyh Chang, Ying-Zu Lin, Chun-Cheng Liu
  • Patent number: D739783
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: September 29, 2015
    Assignee: Merrimack River Precision Industrial Corporation
    Inventors: Chun-Cheng Liu, Tsung-Ming Kung
  • Patent number: D740718
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: October 13, 2015
    Assignee: Merrimack River Precision Industrial Corporation
    Inventors: Chun-Cheng Liu, Tsung-Ming Kung
  • Patent number: D741148
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: October 20, 2015
    Assignee: Merrimack River Precision Industrial Corporation
    Inventor: Chun-Cheng Liu