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US 11,381,234 B2Granted
Electronic circuitry and electronic apparatus
AssigneeKabushiki Kaisha Toshiba
InventorKentaro Ikeda
Life of this patent
Estimating the term…
Abstract
According to one embodiment, electronic circuitry includes a first surge voltage detection circuit configured to detect a surge voltage generated due to switching of a switching device and generate a first signal indicating a first current; and a current generation circuit configured to generate a second current larger than the first current by amplifying a current in response to input of the first signal and output the second current to a control terminal of the switching device.
Claims20
Electronic circuitry comprising:
- a first surge voltage detection circuit configured to detect a surge voltage generated due to switching of a switching device and generate a first signal indicating a first current;
- and
- a current generation circuit configured to generate a second current larger than the first current by amplifying the first current in response to input of the first signal and output the second current to a control terminal of the switching device,
- wherein the first surge voltage detection circuit includes:
- a first diode configured to pass a current input to the first surge voltage detection circuit;
- a capacitor provided between the first diode and the current generation circuit;
- and
- a bias circuit configured to supply a bias voltage to a cathode of the first diode.
5 more elements
An electronic apparatus comprising:
- a first switching device;
- a first surge voltage detection circuit configured to detect a surge voltage generated due to switching of the first switching device and generate a first signal indicating a first current;
- a first current generation circuit configured to generate a second current larger than the first current by amplifying a current in response to input of the first signal and output the second current to a control terminal of the first switching device;
- a second switching device connected in series to the first switching device and configured to be turned on or off out of synchronization with the first switching device;
- a second surge voltage detection circuit configured to detect a surge voltage generated due to switching of the second switching device and generate a second signal indicating a third current;
- and
- a second current generation circuit configured to generate a fourth current larger than the third current in response to input of the second signal and output the fourth current to a control terminal of the second switching device.
4 more elements
An electronic apparatus comprising:
- a plurality of pairs of switching devices;
- and
- surge voltage control circuits corresponding to the switching devices in the plurality of pairs of switching devices, wherein
- each of the surge voltage control circuits includes:
- a surge voltage detection circuit configured to detect a surge voltage generated due to switching of the switching device corresponding the surge voltage control circuit and generate a first signal indicating a first current;
- and
- a current generation circuit configured to generate a second current larger than the first current by amplifying a current in response to input of the first signal and output the second current to a control terminal of the switching device, wherein
- the electronic apparatus generates an alternating current from a DC voltage by sequentially changing a pair of the switching devices which is simultaneously turned on for at least a partial period of time.
5 more elements
Electronic circuitry comprising:
- a first surge voltage detection circuit configured to detect a surge voltage generated due to switching of a switching device and generate a first signal indicating a first current;
- a current generation circuit configured to generate a second current larger than the first current by amplifying a current in response to input of the first signal and output the second current to a control terminal of the switching device;
- a current amplifier control circuit configured to determine an amplification gain of the first current amplified by the current generation circuit;
- and
- a current detection circuit configured to detect a third current flowing in the switching device,
- wherein the current amplifier control circuit is configured to determine the amplification gain of the first current based on the third current.
3 more elements
Electronic circuitry comprising:
- a first surge voltage detection circuit configured to detect a surge voltage generated due to switching of a switching device and generate a first signal indicating a first current;
- a current generation circuit configured to generate a second current larger than the first current by amplifying a current in response to input of the first signal and output the second current to a control terminal of the switching device;
- a current amplifier control circuit configured to determine an amplification gain of the first current amplified by the current generation circuit;
- and
- a second surge voltage detection circuit configured to detect the surge voltage,
- wherein the current amplifier control circuit is configured to determine the amplification gain of the first current based on the detected surge voltage.
3 more elements
Dependencies are inferred from the claim text.