Title:
RADIO FREQUENCY OPERATION CIRCUIT DEVICE FOR LOW VOLTAGE DISCHARGE LAMP
Document Type and Number:
Japanese Patent JPS62243293
Kind Code:
A
Abstract:
To suppress introduction of harmonics into the power supply network of a high-frequency operated fluorescent lamp, an input capacitor (C2) connected across a direct current supply (P1, P2) for a transistor push-pull high-frequency circuit-operating at between 25-50 kHz-has a pair of serially connected diodes (D4, D5) connected thereto. The junction point (M2) of the diodes is connected via a coupling capacity (C7) to a common junction (M1) of the push-pull connected transistors (T1, T2). The power line circuit has a line choke (L2, L2') connected, either in advance or behind a rectifier (G1) supplying direct current to the transistor push-pull circuit. The circuit effectively suppresses harmonics, particularly the third harmonic, without introducing additional losses in the circuit, especially if a further capacitor (C8) is connected in the resonance circuit of the fluorescent lamp and to the diode junction (M2) between the two diodes (D4, D5).
Inventors:
HANSU YURUGEN FUEENRITSUHI
BUARUTAA HIRUSHIYUMAN
BUARUTAA HIRUSHIYUMAN
Application Number:
JP8396187A
Publication Date:
October 23, 1987
Filing Date:
April 07, 1987
Export Citation:
Assignee:
PATENT TREUHAND GES FUER ELEKTRISCHE GLUEHLAMPEN MBH
International Classes:
H05B41/24; H05B41/28; (IPC1-7): H05B41/24
Attorney, Agent or Firm:
Toshio Yano