Triac Patents (Class 327/476)
  • Adaptive triac controller
    Patent number: 8816752
    Abstract: A low voltage AC power controller uses a line coupled capacitor AC to DC converter circuit to obtain energy from AC line power supplied to an AC load and may be used with an external high voltage AC switching device to control power supplied to the AC load. The line coupled capacitor AC to DC converter circuit provides a low power device that senses characteristics of the power supplied to the load and can communicate sensed information and/or receive control information related to the power supplied to load.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: August 26, 2014
    Assignee: Silicon Laboratories Inc.
    Inventor: Eric B. Smith
  • Power recovery circuit based on partial standing waves
    Patent number: 8478344
    Abstract: A power recovery system includes a transmission line that is coupled to transfer an RF signal received via an antenna. The RF signal generates a partial standing wave in the transmission line and the transmission line has at least one standing wave anti-node. A power recovery circuit converts an anti-node signal from the at least one standing wave anti-node to a power signal.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: July 2, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Isolated HF-control SCR switch
    Patent number: 7259407
    Abstract: A vertical SCR switch to be controlled by a high-frequency signal having at least four main alternated layers. The switch includes a gate terminal and a gate reference terminal connected via integrated capacitors to corresponding areas. In the case of a thyristor, having on its front surface side a main P-type semiconductor area formed in an N-type gate semiconductor area, a first portion of the main area being connected to one of the main areas, a second portion of the main area is connected to one of the control terminals via a first integrated capacitor, and a portion of the gate area being connected to the other of the control terminals via a second integrated capacitor.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: August 21, 2007
    Assignee: STMicroelectronics S.A.
    Inventors: Samuel Menard, Christophe Mauriac
  • Triac control circuit
    Patent number: 7151402
    Abstract: A circuit for controlling a triac, comprising: a bidirectional current-limiting active element connecting the triac gate to its opposite power electrode; and a switch connecting the gate to the other power electrode of the triac.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: December 19, 2006
    Assignee: STMicroelectronics S.A.
    Inventors: Benoit Peron, Ghafour Benabdelaziz
  • Circuit for controlling a triac at the voltage zero
    Patent number: 5914628
    Abstract: The present invention relates to a circuit for controlling a triac at the voltage zero. Two transistors of complementary types are connected in parallel between the gate and the main reference terminal of the triac. The control terminals of the transistors are interconnected and connected to the second main terminal of the triac via a resistor of high value. The gate of the triac is connected to a control potential source via a second resistor.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: June 22, 1999
    Assignee: SGS-Thomson Microelectronics S.A.
    Inventor: Pierre Rault