Patents by Inventor Frantisek Mikulenka

Frantisek Mikulenka 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).

  • Secondary side controller and method therefor
    Patent number: 7515442
    Abstract: In one embodiment, a secondary side power supply controller is configured to enable a secondary side power switch independently of a state of a drive signal used to control a primary side of the power supply.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: April 7, 2009
    Assignee: Semiconductor Components Industries, L.L.C.
    Inventors: Frantisek Mikulenka, Roman Urban
  • Secondary side controller and method therefor
    Publication number: 20060268586
    Abstract: In one embodiment, a secondary side power supply controller is configured to enable a secondary side power switch independently of a state of a drive signal used to control a primary side of the power supply.
    Type: Application
    Filed: May 27, 2005
    Publication date: November 30, 2006
    Inventors: Frantisek Mikulenka, Roman Urban
  • Bias stabilizer circuit and method of operation
    Patent number: 6411154
    Abstract: A bias circuit (200, FIG. 2) includes a first bipolar junction transistor (BJT) (240), which provides, to an external transistor (204), a biasing voltage (294) equal to the first BJT's base-emitter junction voltage plus a biasing voltage at the first BJT's base (244). A current multiplying mirror circuit (250) senses a fraction of the first BJT's collector current, and produces a current equal to the collector current. This mirror current flows through a second BJT (230). A voltage at the collector (232) of the second BJT is divided, producing the biasing voltage at the base (244) of the first BJT. This biasing voltage has a temperature coefficient with an opposite sign and a same magnitude as a temperature coefficient of the first BJT's base-emitter junction voltage, resulting in a near zero temperature coefficient for the biasing voltage (294).
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: June 25, 2002
    Assignee: Semiconductor Components Industries LLC
    Inventor: Frantisek Mikulenka