SWITCHING CIRCUIT
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United States of America Patent
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Issued Date -
Aug 15, 2019
app pub date -
Feb 1, 2019
filing date -
Feb 9, 2018
priority date (Note) -
Granted
status (Latency Note)
Importance
Abstract
A switching circuit includes: a DC electric power supply; a first switching element; a second switching element; a resistor that is connected to the DC electric power supply in series with the second switching element; a voltage sensor that detects a voltage applied to the resistor; and a control device, wherein: a current flowing through the first switching element is larger than a current flowing through the second switching element; and the control device is configured to: turn off the second switching element and then turn off the first switching element; and compute a voltage applied between the first collector and the first emitter by integrating a value proportional to a voltage that is detected by the voltage sensor after turning off the first switching element.
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