EP 0021508 B1 19821020 - FIRING AND OPERATING CIRCUIT ARRANGEMENT FOR GAS AND/OR VAPOUR DISCHARGE LAMPS
Title (en)
FIRING AND OPERATING CIRCUIT ARRANGEMENT FOR GAS AND/OR VAPOUR DISCHARGE LAMPS
Publication
Application
Priority
DE 2924069 A 19790615
Abstract (en)
[origin: US4358711A] A circuit arrangement for starting and operating a discharge lamp by means of an electronic ballast includes a series arrangement of a PTC resistor and an ohmic resistor connected in parallel with an electronic switch of the ballast, with only the PTC resistor being in parallel with a control circuit of the electronic switch. The value of the ohmic resistor is 8 to 12 times the cold resistance of the PTC resistor.
IPC 1-7
IPC 8 full level
H05B 41/04 (2006.01); H05B 41/18 (2006.01); H05B 41/24 (2006.01); H05B 41/392 (2006.01)
CPC (source: EP US)
H05B 41/046 (2013.01 - EP US); H05B 41/3927 (2013.01 - EP US); Y10S 315/07 (2013.01 - EP US)
Citation (examination)
DE 2263582 A1 19730726 - PHILIPS NV
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0021508 A1 19810107; EP 0021508 B1 19821020; AT 378096 B 19850610; AT A313980 A 19841015; CA 1149077 A 19830628; DE 2924069 A1 19801218; DE 2924069 C2 19820513; DE 3060970 D1 19821125; JP S563996 A 19810116; JP S6329800 B2 19880615; US 4358711 A 19821109
DOCDB simple family (application)
EP 80200547 A 19800613; AT 313980 A 19800613; CA 353457 A 19800605; DE 2924069 A 19790615; DE 3060970 T 19800613; JP 7962880 A 19800614; US 14655180 A 19800505