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US 6,204,601 B1Granted
Device for controlling a magnetron filament current based on detected dynamic impedance
AssigneeFusion Lighting, Inc.
InventorsKjell Lidström, Jan Grabs
Life of this patent
Estimating the term…
Abstract
The present invention refers to a method for controlling a magnetron filament current. The control is provided by detecting the dynamic impedance or a noise level of the magnetron and by controlling the magnetron filament current based thereupon.
Claims29
Method for controlling a magnetron filament current, comprising the steps of:
- detecting the actual dynamic impedance of the magnetron during operation;
- and
- controlling the magnetron filament current based thereupon.
Method for controlling a magnetron filament current, comprising the steps of:
- detecting an actual noise level of the magnetron, specifically a noise in the output signal from the power supply to said magnetron, during operation;
- and
- controlling the magnetron filament current based thereupon;
- whereupon said detection of the actual noise level comprises detecting the noise in the microwave signal outputted by the magnetron.
1 more element
Device for controlling a magnetron filament current, comprising:
- detection means for detecting an actual noise level of the magnetron, specifically in the output signal from the power supply to said magnetron;
- and
- control means for controlling the magnetron filament current based upon said detected actual noise level;
- wherein said detection means comprise a microwave antenna (A) for detecting noise in the microwave signal (MW) outputted by the magnetron.
1 more element
Device for controlling a magnetron filament current, comprising:
- detection means (20, R;
- 20′, 21, R) for detecting an actual dynamic impedance of a magnetron;
- and
- control means (10) for controlling the magnetron filament current based upon said detected actual dynamic impedance.
1 more element
Dependencies are inferred from the claim text.