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Lifting platform with energy recovery
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Elastic motor with constant torque output
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Ballasts for operating light emitting diodes in AC circuits
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Means for transformer rectifier unit regulation
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Inverter control using current mode slope modulation
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Isolated transformer coupled gate drive for signals having variable duty cycle
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Resonant forward converter circuit with control circuit for controlling switching transistor on and off times
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Method and apparatus for three-phase voltage doubling
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Short circuit monitor for static inverters and the like
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Selectively switched, malfunction-responsive three phase and parallel logic box for plural static inverters
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Parallel phase lock circuitry for inverters and the like
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