Circuit for driving saw-tooth current in a coil

Details Circuit for driving saw-tooth current in a coil Circuit for driving saw-tooth current in a coil

1979-05-23

1981-01-27

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315407, H01J 2970

Patent

active

042478057

ABSTRACT:
A circuit for driving a saw-tooth current in a coil includes a deflection circuit formed by the coil connected in parallel with a retrace capacitor and in series with a trace capacitor. The deflection circuit is connected in parallel with a first diode which conducts during the first half of the trace interval and in parallel with a second diode connected in series with a controllable switch which conducts during the second half of the trace interval. While the transistor is conductive, current flows through an inductor connected in series with it. The energy stored in this inductor is transferred at a subsequent stage partly to the deflection circuit and partly to a further capacitor. The further capacitor subsequently itself transfers the charge stored in it through a second inductor and a fourth diode to the deflection circuit so that at no time is energy dissipated in a load.

REFERENCES:
patent: 3950674 (1976-04-01), Joosten et al.
patent: 4099101 (1978-07-01), Teuling
patent: 4153862 (1979-05-01), Lim
patent: 4162433 (1979-07-01), Van Hattum

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