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| Inverter controller |
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| Method and apparatus for programmably adjusting output voltage of a battery charger |
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| Battery protection device |
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| State of charge method and apparatus |
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| Method and device for carrying out frequency synthesis in a distance measuring device |
| OF THE PREFERRED EMBODIMENTS In FIG. 1, one example of a distance measuring device is shown, which ... |
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| Guard circuit for the protection of capacitive loads |
| Proceeding from the aforedefined state of prior art, the present invention is based on the problem ... |
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| Lighting circuit for vehicular discharge lamp |
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Power converter with increased breakdown voltage maintaining stable operation
| Details |
Inventors: Majumdar, Gourab; Hatae, Shinji; Yoshimura, Kousuke;
Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Sterrett; Jeffrey
Assistant Examiner:
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
It is an object to enhance a breakdown voltage without requiring a complicated manufacturing process while maintaining a stable operation. A control signal (A) output from an MCU (11) is transmitted to a driving circuit (3a) for driving a power switching element (1a) of an upper arm through two-stage level shift circuits. The level shift circuit in a first stage is constituted by a series circuit of a switching element (13) and a resistive element (14), and the level shift circuit in a second stage is constituted by a series circuit of a switching element (16) and a resistive element (17). |
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DETAILED DESCRIPTION In order to solve the above-mentioned problems in the conventional art, it is an object of the present invention to provide a power converter and a signal level converter which can increase a breakdown voltage without requiring a complicated manufacturing process while maintaining a stable operation.
A first aspect of the present invention is directed to a power converter comprising a first switching element having first and second main electrodes, a second switching element having third and fourth main electrodes, the fourth main electrode being connected to the first main electrode, a first driving circuit to drive the first switching element based on a first control signal input from an outside, a second, driving circuit to drive the second switching element based on a second control signal input from an outside, and n level shift circuits connected in cascade in n stages, the n being an integer of 2 or more, and configured to level shift the first control signal in the n stages and to transmit the level shifted signal to the first driving circuit.
A second aspect of the present invention is directed to the power converter according to the first aspect of the present invention, further comprising a sense circuit to detect an operation state of the first switching element and to output a detection signal representing the operation state, and n other level shift circuits connected in cascade in n stages and configured to level shift the detection signal in the n stages and to transmit the level shifted signal to an outside.
A third aspect of the present invention is directed to the power converter according to the second aspect of the present invention, further comprising a one-shot pulse circuit connected to an input of each of the n other level shift circuits, and a latch circuit connected to an output of each of the n other level shift circuits.
A fourth aspect of the present invention is directed to the power converter according to any of the first to third aspects of the present invention, further comprising a one-shot pulse circuit connected to an input of each of the n level shift circuits, and a latch circuit connected to an output of each of the n level shift circuits
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Electrical and Wave 
