Protection circuit for traveling wave tubes having multiple input tones
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United States of America Patent
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Nov 27, 2001
Grant Date -
N/A
app pub date -
Oct 21, 1999
filing date -
Oct 21, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A protection circuit (30) for a Traveling Wave Tube having multiple tone operation. The protection circuit (30) is a dual sensor (52, 54) arrangement. One sensor (52) is an operational amplifier circuit (56) having a short time constant and a high threshold current. The first sensor (52) provides protection against short time scale faults. The second sensor (54) is an operational amplifier circuit (58) having a time constant higher than the first sensor (52) and a lower current threshold than the first sensor (52) to provide protection against long time scale events. The two sensors (52 and 54) are logically 'OR'ed with each other and eliminate spurious shutdowns and circuit damage.
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