Power dissipation limiter for high frequency switch
OwnerNeils A. Kruseinventor
Life of this patent
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Abstract
The command input of a high frequency switch is gated with the output of a power dissipation limiter. The limiter includes a counter that counts pulses of the command input. Between regularly occurring reset pulses, if a pulse count is obtained that indicates a burst period above a normal threshold level, the limiter generates a fault signal that inhibits further operation of the high frequency switch until the next regularly occurring reset pulse.
Claims10
A method for limiting power dissipation of a high frequency switch having a variable frequency command input, the method comprising:
- counting pulses in each cycle of a command input signal;
- periodically resetting the count to zero, at a constant frequency;
- detecting the count at a preselected value, before resetting the count;
- setting a latch upon the detection of the preselected value count;
- generating a fault signal output from a set latch;
- gating the fault signal and the command input signal together, to form a gated command input signal;
- and
- connecting the resulting gated command input signal to the command input of the high frequency switch for inhibiting switch operation until the count is reset to zero.
A power dissipation limiter for a high frequency switch having a variable frequency command input, the limiter comprising:
- means for counting pulses in each cycle of a command input signal;
- means for periodically resetting the count to zero at a constant frequency;
- means for detecting the count at a preselected value, before resetting of the count;
- latch means that set upon the detection of the preselected value count for generating a fault signal output;
- means for gating the fault signal and the command input signal together, to form a gated command input signal;
- and
- means connecting the resulting gated command input signal to the command input of the high frequency switch for inhibiting switch operation until the count is reset to zero.
Dependencies are inferred from the claim text.