EP 0378997 A3 19920902 - HF GENERATOR FOR HIGH-POWER CONSUMERS
Title (en)
HF GENERATOR FOR HIGH-POWER CONSUMERS
Publication
Application
Priority
DE 3900958 A 19890114
Abstract (en)
[origin: EP0378997A2] The invention relates to an RF generator for high-power consumers, with a self-excited oscillator SK, RK, Tr, having a multi-grid valve Tr. In order to be able to generate radio-frequency pulses of any shape, an electronic switch T1 is connected to a control grid G1 of the multi-grid valve Tr, which is connected to the feedback RK, with which switch T1 the control grid G1 can optionally be connected to the cathode K of the multi-grid valve Tr or to a negative bias voltage. In this way, it is possible to interrupt the oscillations. The amplitude modulation of the radio-frequency voltage within the pulse set on the other control grid G1 is carried out on the second control grid G2 of the multi-grid valve Tr. By combining the two control possibilities, any desired pulse shape of the RF voltage can be generated. <IMAGE>
IPC 1-7
IPC 8 full level
H05B 6/04 (2006.01)
CPC (source: EP)
H05B 6/04 (2013.01)
Citation (search report)
- [A] EP 0063479 A2 19821027 - MARCONI CO LTD [GB]
- [A] US 3387378 A 19680611 - NEWSOM ROY R
- [A] US 3332036 A 19670718 - KAPPENHAGEN GEORGE A, et al
- [A] US 4272737 A 19810609 - MOLYNEUX-BERRY ROBERT B
- [A] ELECTRONIQUE Nr. 275, November 1979, Seite 53; '3 ou 30 kw à réglage continu pour chauffage HF'
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0378997 A2 19900725; EP 0378997 A3 19920902; DE 3900958 A1 19900726; DE 3900958 C2 19910110
DOCDB simple family (application)
EP 90100122 A 19900104; DE 3900958 A 19890114