Patents by Inventor Junsoo CHO

Junsoo CHO 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).

  • Analog-to-digital converter and microphone including the same
    Patent number: 10938398
    Abstract: An analog-to-digital converter (ADC) includes a first operator configured to subtract an analog value from an analog signal; an amplifier configured to amplify an output of the first selector; a filter configured to filter an output of the amplifier; a quantizer configured to generate a digital bit stream from an output of the filter; and a digital-to-analog converter (DAC) configured to output the analog value according to the digital bit stream.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: March 2, 2021
    Assignee: Seoul National University R&DB Foundation
    Inventors: Suhwan Kim, Junsoo Cho, Youngtae Yang
  • Analog-to-digital converter correcting frequency characteristics and semiconductor device including the same
    Patent number: 10848173
    Abstract: An analog-to-digital converter (ADC) includes a modulator configured to oversample an input signal generated from an output signal of a transducer; and a filter configured to perform a decimation operation on an output from the modulator and a frequency characteristics correction operation according to a filter control signal on the output from the modulator, wherein the frequency characteristics correction operation is performed to complement a frequency characteristics of the output signal of the transducer such that overall frequency characteristics of the transducer and the filter be flat in a signal band.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: November 24, 2020
    Assignee: Seoul National University R&DB Foundation
    Inventors: Suhwan Kim, Junsoo Cho
  • ANALOG-TO-DIGITAL CONVERTER AND MICROPHONE INCLUDING THE SAME
    Publication number: 20200186157
    Abstract: An analog-to-digital converter (ADC) includes a first operator configured to subtract an analog value from an analog signal; an amplifier configured to amplify an output of the first selector; a filter configured to filter an output of the amplifier; a quantizer configured to generate a digital bit stream from an output of the filter; and a digital-to-analog converter (DAC) configured to output the analog value according to the digital bit stream.
    Type: Application
    Filed: February 13, 2020
    Publication date: June 11, 2020
    Applicant: Seoul National University R&DB Foundation
    Inventors: Suhwan KIM, Junsoo CHO, Youngtae YANG
  • MEMS TRANSDUCER PACKAGE AND A MEMS DEVICE INCLUDING THE SAME
    Publication number: 20200095116
    Abstract: A microelectromechanical sensors (MEMS) device includes a first substrate, a MEMS transducer package attached on the first substrate and including a MEMS transducer therein configured to output an electrical signal corresponding to movement of fluid, and a semiconductor device attached on the first substrate and configured to process the electrical signal provided from the MEMS transducer.
    Type: Application
    Filed: November 27, 2019
    Publication date: March 26, 2020
    Applicant: Seoul National University R&DB Foundation
    Inventors: Junsoo CHO, Suhwan KIM
  • ANALOG-TO-DIGITAL CONVERTER CORRECTING FREQUENCY CHARACTERISTICS AND SEMICONDUCTOR DEVICE INCLUDING THE SAME
    Publication number: 20190386675
    Abstract: An analog-to-digital converter (ADC) includes a modulator configured to oversample an input signal generated from an output signal of a transducer; and a filter configured to perform a decimation operation on an output from the modulator and a frequency characteristics correction operation according to a filter control signal on the output from the modulator, wherein the frequency characteristics correction operation is performed to complement a frequency characteristics of the output signal of the transducer such that overall frequency characteristics of the transducer and the filter be flat in a signal band.
    Type: Application
    Filed: August 30, 2019
    Publication date: December 19, 2019
    Applicant: Seoul National University R&DB Foundation
    Inventors: Suhwan KIM, Junsoo CHO
  • Quantizer with sigma-delta modulator, analog-to-digital converter including the same and quantization method using the same
    Patent number: 9054738
    Abstract: The present invention provides a quantizer with a sigma-delta modulator, an analog-to-digital converter including the same and a quantization method using the same capable of obtaining a high signal-to-noise ratio with a relatively small number of comparators. The quantizer, the analog-to-digital converter and the quantization method of the present invention reduces quantization errors and increases noise shaping order.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: June 9, 2015
    Assignee: SNU R&DB FOUNDATION
    Inventors: Junsoo Cho, Hyunjoong Lee, Suhwan Kim
  • QUANTIZER WITH SIGMA-DELTA MODULATOR, ANALOG-TO-DIGITAL CONVERTER INCLUDING THE SAME AND QUANTIZATION METHOD USING THE SAME
    Publication number: 20140347200
    Abstract: The present invention provides a quantizer with a sigma-delta modulator, an analog-to-digital converter including the same and a quantization method using the same capable of obtaining a high signal-to-noise ratio with a relatively small number of comparators. The quantizer, the analog-to-digital converter and the quantization method of the present invention reduces quantization errors and increases noise shaping order.
    Type: Application
    Filed: May 23, 2014
    Publication date: November 27, 2014
    Applicants: NEOFIDELITY, INC., SNU R&DB FOUNDATION
    Inventors: Junsoo CHO, Hyunjoong LEE, Suhwan KIM