Patents by Inventor Chuhua FENG

Chuhua FENG 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).

  • Flash-memory low-speed read mode control circuit
    Patent number: 9202582
    Abstract: The present invention discloses a flash-memory low-speed read mode control circuit, which comprises a charge pump, a first voltage division circuit composed of two resistors and a first switch interconnected in series, and a second voltage division circuit composed of two capacitors interconnected in series. The first switch is used for switching between the data read mode of the low-speed read mode and the charge pump electric-leakage mode. In the data read mode, a first component voltage formed by the two resistors is fed back to the input terminal of the charge pump through a comparator, an NAND gate and a buffer, making a stable value of the output voltage of the charge pump proportional to the first component voltage.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: December 1, 2015
    Assignee: Shanghai Huahong Grace Semiconductor Manufacturing Corporation
    Inventors: Guangjun Yang, Chuhua Feng
  • FLASH-MEMORY LOW-SPEED READ MODE CONTROL CIRCUIT
    Publication number: 20150332776
    Abstract: The present invention discloses a flash-memory low-speed read mode control circuit, which comprises a charge pump, a first voltage division circuit composed of two resistors and a first switch interconnected in series, and a second voltage division circuit composed of two capacitors interconnected in series. The first switch is used for switching between the data read mode of the low-speed read mode and the charge pump electric-leakage mode. In the data read mode, a first component voltage formed by the two resistors is fed back to the input terminal of the charge pump through a comparator, an NAND gate and a buffer, making a stable value of the output voltage of the charge pump proportional to the first component voltage.
    Type: Application
    Filed: December 22, 2014
    Publication date: November 19, 2015
    Inventors: Guangjun YANG, Chuhua FENG