Patents by Inventor Petr Stekl

Petr Stekl 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).

  • Circuit and method for supplying an electrical a.c. load
    Patent number: 7015679
    Abstract: A method and circuit for supplying a variable voltage to an electrical a.c. load (R, L), comprising: a control signal input for receiving a switching control signal to control load output voltage; first and second circuit output terminals (ACL1, ACL2) for connection to the load; first switch means (S1) having an input coupled to the control signal input and having an output coupled between one (ACL1) of the circuit output terminals (ACL1) and a first a.c. line terminal (AC1); second switch means (S2) having an input coupled to the first switch means and having an output coupled between the first and second circuit output terminals (ACL1, ACL2) and coupled to a second a.c. line terminal (AC2); and providing a switching control signal to the control signal input to switch the first and second switch means complementarily. The switch means may each comprise a power transistor (Q1; Q2) and a bridge rectifier (B1; B2).
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: March 21, 2006
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Jiri Ryba, Pavel Grasblum, Petr Stekl
  • Circuit and method for supplying an electrical a.c. load
    Publication number: 20040135557
    Abstract: A method and circuit for supplying a variable voltage to an electrical a.c. load (R, L), comprising: a control signal input for receiving a switching control signal to control load output voltage; first and second circuit output terminals (ACL1, ACL2) for connection to the load; first switch means (S1) having an input coupled to the control signal input and having an output coupled between one (ACL1) of the circuit output terminals (ACL1) and a first a.c. line terminal (AC1); second switch means (S2) having an input coupled to the first switch means and having an output coupled between the first and second circuit output terminals (ACL1, ACL2) and coupled to a second a.c. line terminal (AC2); and providing a switching control signal to the control signal input to switch the first and second switch means complementarily. The switch means may each comprise a power transistor (Q1; Q2) and a bridge rectifier (B1; B2).
    Type: Application
    Filed: December 19, 2003
    Publication date: July 15, 2004
    Inventors: Jiri Ryba, Pavel Grasblum, Petr Stekl