EP 0201973 B1 19900307 - CIRCUIT ARRANGEMENT FOR OPERATING GAS DISCHARGE LAMPS WITH A PERIODIC ALTERNATING LAMP CURRENT
Title (en)
CIRCUIT ARRANGEMENT FOR OPERATING GAS DISCHARGE LAMPS WITH A PERIODIC ALTERNATING LAMP CURRENT
Publication
Application
Priority
DE 3517248 A 19850513
Abstract (en)
[origin: US4888524A] A circuit arrangement for operating at least one gas discharge lamp (5) with a periodically varying lamp current and adapted for connection to an alternating voltage source with a period N. The circuit is provided with a controlled semiconductor switch (3) and a control circuit for switching the controlled semiconductor switch with a switching period S in dependence upon a comparison between an actual signal proportional to the lamp current and a nominal signal derived from a voltage across the switching transistor (3).
IPC 1-7
IPC 8 full level
H05B 41/24 (2006.01); H05B 41/288 (2006.01); H05B 41/392 (2006.01)
CPC (source: EP US)
H05B 41/288 (2013.01 - EP US); H05B 41/392 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0201973 A1 19861120; EP 0201973 B1 19900307; DE 3517248 A1 19861113; DE 3669429 D1 19900412; JP S61260598 A 19861118; US 4888524 A 19891219
DOCDB simple family (application)
EP 86200792 A 19860505; DE 3517248 A 19850513; DE 3669429 T 19860505; JP 10778786 A 19860513; US 15808288 A 19880216