Global Patent Index - EP 0981933 A1

EP 0981933 A1 20000301 - CIRCUIT ARRANGEMENT

Title (en)


Title (de)


Title (fr)



EP 0981933 A1 20000301 (EN)


EP 98937713 A 19980821


  • EP 98937713 A 19980821
  • EP 97202684 A 19970901
  • IB 9801302 W 19980821

Abstract (en)

[origin: WO9912402A1] The invention relates to a circuit arrangement for supplying a lamp (La) with a high-frequency current, provided with a DC-AC converter which comprises a bridge circuit provided with bipolar switches (51, 52), a control transformer (Lprim, SEC1, SEC2, P1, P2, Z1, Z3) for rendering the switches conducting and non-conducting, and a ballast coil (Lb, Z2). The control transformer and the ballast coil are integrated into one component in such a manner that the magnetic material surrounded by the secondary windings (SEC1, SEC2) of the control transformer becomes saturated during each high-frequency cycle, whereas the ballast coil does not become saturated. The control of the switches with low power losses and the ballast function are thus effectively realized by means of one component.

IPC 1-7

H05B 41/28

IPC 8 full level

H05B 41/02 (2006.01); H05B 41/24 (2006.01); H05B 41/28 (2006.01); H05B 41/282 (2006.01)

CPC (source: EP)

H05B 41/2827 (2013.01)

Citation (search report)

See references of WO 9912402A1

Designated contracting state (EPC)


DOCDB simple family (publication)

WO 9912402 A1 19990311; CN 1237321 A 19991201; EP 0981933 A1 20000301; JP 2001504984 A 20010410

DOCDB simple family (application)

IB 9801302 W 19980821; CN 98801272 A 19980821; EP 98937713 A 19980821; JP 51649899 A 19980821