Patents by Inventor HO-TZU CHUEH

HO-TZU CHUEH 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).

  • Power supply with open-loop protection and short-circuit protection
    Patent number: 8665621
    Abstract: The power supply according to the present invention comprises a transformer, a power switch, a signal generating circuit, an on-time detection circuit, and a delay circuit. The transformer receives an input voltage and generates an output voltage. The power switch switches the transformer for regulating the output voltage. The signal generating circuit generates a switching signal for controlling switching of the power switch. The on-time detection circuit detects an on-time of the power switch and generates a short-circuit signal. The delay circuit counts to a first delay time or to a second delay time in response to a feedback signal of the power supply and the short-circuit signal to generate a turn off signal for controlling the signal generating circuit to latch the switching signal.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: March 4, 2014
    Assignee: System General Corp.
    Inventors: Meng-Jen Tsai, Ho-Tzu Chueh, Cheng-Chi Hsueh, Chien-Yuan Lin
  • POWER SUPPLY WITH OPEN-LOOP PROTECTION AND SHORT-CIRCUIT PROTECTION
    Publication number: 20120106205
    Abstract: The power supply according to the present invention comprises a transformer, a power switch, a signal generating circuit, an on-time detection circuit, and a delay circuit. The transformer receives an input voltage and generates an output voltage. The power switch switches the transformer for regulating the output voltage. The signal generating circuit generates a switching signal for controlling switching of the power switch. The on-time detection circuit detects an on-time of the power switch and generates a short-circuit signal. The delay circuit counts to a first delay time or to a second delay time in response to a feedback signal of the power supply and the short-circuit signal to generate a turn off signal for controlling the signal generating circuit to latch the switching signal.
    Type: Application
    Filed: October 28, 2011
    Publication date: May 3, 2012
    Applicant: SYSTEM GENERAL CORP.
    Inventors: MENG-JEN TSAI, HO-TZU CHUEH, CHENG-CHI HSUEH, CHIEN-YUAN LIN