Patents by Inventor Vinh Q. Le

Vinh Q. Le 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).

  • Method of fabricating packaged TRIAC and trigger switch
    Patent number: 4914045
    Abstract: A two-terminal, bidirectional semiconductor trigger switch is provided. The trigger switch is a relatively sensitive multilayer semiconductor breakover device that switches on fully when its breakover voltage is reached. The design of the trigger switch allows its breakover voltage point to be readily adjustable during fabrication of the device.The semiconductor trigger switch is particularly suited to provide a low voltage trigger for a TRIAC. The trigger switch is connected in series with the gate of the TRIAC and mounted on the gate lead to provide a unitary, three-terminal device incorporating the TRIAC/trigger switch combination.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: April 3, 1990
    Assignee: Teccor Electronics, Inc.
    Inventors: Monty F. Webb, Vinh Q. Le, Elmer L. Turner, Jr.
  • Electronic trigger switch for maintenance termination unit
    Patent number: 4827497
    Abstract: A telephone maintenance termination unit utilizes a low voltage, bidirectional trigger switch for performing diagnostic functions on a telephone line. The trigger switch provides low voltage, low current triggering in conjunction with a high holding current requirement. The trigger switch may comprise either two silicon controlled rectifiers connected in inverse parallel relationship with their gates connected, a bidirectional diffused PNPN semiconductor device, or an NPN semiconductor device, any one of which is used to trigger a power control TRIAC. In another embodiment, the switching device may be a two-terminal, unitary semiconductor device incorporating the functions of both the TRIAC and the bidirectional trigger switch.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: May 2, 1989
    Assignee: Teccor Electronics, Inc.
    Inventors: Richard G. Norris, Monty F. Webb, Vinh Q. Le
  • Electronic trigger switch for maintenance termination unit
    Patent number: 4685120
    Abstract: A telephone maintenance termination unit utilizes a low voltage, bidirectional trigger switch. The trigger switch provides low voltage, low current triggering in conjunction with a high holding current requirement. The trigger switch may comprise either two silicon controlled rectifiers connected in inverse parallel relationship with their gates connected, a bidirectional diffused PNPN semiconductor device, or an NPN semiconductor device, any one of which is used to trigger a power control TRIAC. In another embodiment, the switching device may be a two-terminal, unitary semiconductor device incorporating the functions of both the TRIAC and the bidirectional trigger switch.
    Type: Grant
    Filed: November 26, 1985
    Date of Patent: August 4, 1987
    Assignee: Teccor Electronics, Inc.
    Inventors: Richard G. Norris, Monty F. Webb, Vinh Q. Le