Patents by Inventor Ching-Shan Chien

Ching-Shan Chien 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).

  • Voltage level shifting apparatus
    Patent number: 8373485
    Abstract: A voltage level shifting apparatus is disclosed. The voltage level shifting apparatus has a cross-coupled transistor pair, a plurality of transistor pairs, a first diode string, a second diode string and an input transistor pair. One of the transistor pairs is coupled to the cross-coupled transistor pair, and the transistor pairs are controlled by a plurality of reference voltages. The first and the second diode strings are coupled between two of the transistor pairs. Each of the first and the second diode strings has at least one diode. The input transistor pair receives a first and a second input voltage, and the first and second input voltages are complementary signals. The cross-coupled transistor pair generates and outputs a first output voltage and a second output voltage by shifting the voltage level of the first and the second input voltage.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: February 12, 2013
    Assignee: eMemory Technology Inc.
    Inventors: Chen-Hao Po, Yen-Tai Lin, Way-Chen Wu, Ching-Shan Chien
  • VOLATGE LEVEL SHIFTING APPARATUS
    Publication number: 20120268188
    Abstract: A voltage level shifting apparatus is disclosed. The voltage level shifting apparatus has a cross-coupled transistor pair, a plurality of transistor pairs, a first diode string, a second diode string and an input transistor pair. One of the transistor pairs is coupled to the cross-coupled transistor pair, and the transistor pairs are controlled by a plurality of reference voltages. The first and the second diode strings are coupled between two of the transistor pairs. Each of the first and the second diode strings has at least one diode. The input transistor pair receives a first and a second input voltage, and the first and second input voltages are complementary signals. The cross-coupled transistor pair generates and outputs a first output voltage and a second output voltage by shifting the voltage level of the first and the second input voltage.
    Type: Application
    Filed: April 20, 2011
    Publication date: October 25, 2012
    Applicant: EMEMORY TECHNOLOGY INC.
    Inventors: Chen-Hao Po, Yen-Tai Lin, Way-Chen Wu, Ching-Shan Chien