Patents by Inventor Zhifu SHI

Zhifu SHI 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).

  • PHASE-LOCKED LOOP FREQUENCY SYNTHESIZER AND CONTROL METHOD THEREFOR
    Publication number: 20240007115
    Abstract: Provided are a phase-locked loop frequency synthesizer and control method therefor. The phase-locked loop frequency synthesizer includes: a voltage-controlled oscillator configured to generate a microwave signal; a directional coupler configured to: divide the microwave signal into a primary signal and a coupling signal, and transmit the primary signal into a transmitter of the paramagnetic resonance spectrometer to enter a resonator; an automatic frequency controller connected to the resonator and configured to: generate a first oscillation signal and a second oscillation signal, generate a frequency deviation signal, and generate a frequency setting signal based on the frequency deviation signal; and a phase-locked loop controller connected to the directional coupler, the voltage-controlled oscillator, and the automatic frequency controller and configured to: generate a low-phase-noise signal and control the voltage-controlled oscillator.
    Type: Application
    Filed: September 19, 2023
    Publication date: January 4, 2024
    Inventors: Zhifu SHI, Wei ZHANG
  • Magnetic resonance spectrometer and control apparatus for magnetic resonance spectrometer based on FPGA
    Patent number: 11002695
    Abstract: A magnetic resonance spectrometer and a control apparatus for the magnetic resonance spectrometer based on an FPGA. The control apparatus includes a control unit and a conversion receiving unit. The control unit includes a clock source. A waveform generation unit and a signal receiving unit inside the control apparatus are synchronized by means of the same clock source. The control apparatus includes two working modes: a continuous wave mode and an impulse wave mode. The control apparatus can output a microwave signal which is modulated by any wave and has higher synchronism and time resolution.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: May 11, 2021
    Assignee: University of Science and Technology of China
    Inventors: Xing Rong, Zhifu Shi, Xi Qin, Yijin Xie, Lin Wang, Zhen Jiang, Jiangfeng Du
  • FPGA-based square-wave generator and square-wave generation method
    Patent number: 10733126
    Abstract: An FPGA-based square-wave generator and a square-wave generation method.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: August 4, 2020
    Assignee: University of Science and Technology of China
    Inventors: Xi Qin, Yijin Xie, Xing Rong, Yu He, Lin Wang, Zhifu Shi, Jiangfeng Du
  • MAGNETIC RESONANCE SPECTROMETER AND CONTROL APPARATUS FOR MAGNETIC RESONANCE SPECTROMETER BASED ON FPGA
    Publication number: 20200003713
    Abstract: A magnetic resonance spectrometer and a control apparatus for the magnetic resonance spectrometer based on an FPGA. The control apparatus includes a control unit and a conversion receiving unit. The control unit includes a clock source. A waveform generation unit and a signal receiving unit inside the control apparatus are synchronized by means of the same clock source. The control apparatus includes two working modes: a continuous wave mode and an impulse wave mode. The control apparatus can output a microwave signal which is modulated by any wave and has higher synchronism and time resolution.
    Type: Application
    Filed: May 5, 2016
    Publication date: January 2, 2020
    Applicant: University of Science and Technology of China
    Inventors: Xing RONG, Zhifu SHI, Xi QIN, Yijin XIE, Lin WANG, Zhen JIANG, Jiangfeng DU
  • FPGA-BASED SQUARE-WAVE GENERATOR AND SQUARE-WAVE GENERATION METHOD
    Publication number: 20190196999
    Abstract: An FPGA-based square-wave generator and a square-wave generation method.
    Type: Application
    Filed: January 18, 2016
    Publication date: June 27, 2019
    Applicant: University of Science and Technology of China
    Inventors: Xi QIN, Yijin XIE, Xing RONG, Yu HE, Lin WANG, Zhifu SHI, Jiangfeng DU