Hybrid amplifier for inductive load
AssigneeFreemelt AB
InventorsRobin STEPHANSEN, Fredrik SELMOSSON
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Abstract
The present invention relates to a circuit arrangement comprising an analogue amplifier electrically connected to a first end of an inductive load. Further at least one electrical switch is electrically connected to a second end of the inductive load, where the electrical switch increases the rate of current change in the inductive load by applying an electrical voltage potential to the second end of the inductive load. The voltage at the second end can also be switched by a digital circuit at the second end for improved performance The inductive load may e.g. be a beam control coil, which may be provided for controlling an electron beam, e.g. in an electron gun.
Claims19
A circuit arrangement comprising an analogue amplifier connected to a first end of an inductive load, and at least one electrical switch connected to a second end of said inductive load, where the at least one electrical switch increases the rate of current change in the inductive load by applying a voltage potential to the second end of the inductive load.
An electron gun for generating an electron beam comprising a beam control coil for controlling the position and/or orientation of an electron beam, and a circuit arrangement, wherein the circuit arrangement comprises an analogue amplifier connected to a first end of the beam control coil, and at least one electrical switch connected to a second end of the beam control coil, and wherein the least one electrical switch is configured to control the voltage at the second end of the beam control coil by repeatedly switching between at least two different voltage levels, in order to control the rate of current change in said beam control coil, and thereby achieve a rapid change in the position and/or orientation of the electron beam.
Dependencies are inferred from the claim text.