Switchable very-high-voltage direct-current power supply for capacitive load
AssigneeThomson-CSF
InventorClaude Ragot
Life of this patent
Estimating the term…
Abstract
A power supply designed primarily for polychrome cathode-ray tubes of the penetration type and capable of switchover to three and/or four levels comprises a main high-voltage source and one or more auxiliary sources having lower rated voltage values, the auxiliary source or sources being combined with the main source by means of a set of switches according to the total value of voltage to be applied to the polychrome cathode-ray tube in order to obtain a predetermined color. A circuit for recovering the switching energy is associated with the four-level supply system.
Claims12
A very-high-voltage direct-current power supply for a capacitive load, comprising:
- a bridge circuit with four resistance arms;
- a main direct-current source of high nominal voltage connected in series with said load across one diagonal of said bridge circuit;
- at least one auxiliary direct-current source of lower nominal voltage connected across the other diagonal of said bridge;
- and
- a set of four switches respectively inserted in said arms and operable in pairs for additively combining the voltages of said main and auxiliary sources in a first position, subtractively combining the voltages of said main and auxiliary sources in a second position, and disconnecting said auxiliary source from said load in a third position.
Dependencies are inferred from the claim text.