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Akio Sagawa Patents |
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Inventor: Sagawa; Akio
Address: Hitachi, JP
No. of patents: 4
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4465967 |
Current supply circuit |
August 14, 1984 |
| A current supply circuit comprises a DC power feed circuit exhibiting a constant current characteristic for a power source and a constant resistance characteristic for a load, a first detecting circuit for detecting a load current or a load voltage, a DC-DC converter circuit inserted |
| 4392069 |
Semiconductor switch |
July 5, 1983 |
| In semiconductor switches, erroneous firing is often a serious problem. To overcome this, a semiconductor switch is provided which includes a thyristor of PNPN structure with three PN junctions and with anode, cathode and gate electrodes, a first transistor for short-circuiting at le |
| 4184086 |
Semiconductor switch |
January 15, 1980 |
| A semiconductor switch comprising a PNPN switch which has a four-layered PNPN structure with at least three PN-junctions, switching means for electrically short-circuiting a path between a P-type base and an N-type emitter of the PNPN switch when a transient voltage is applied between a |
| 4040294 |
Apparatus for detecting misfire in multicylinder internal combustion engine |
August 9, 1977 |
| An apparatus for detecting misfire in a multicylinder internal combustion engine, comprising a sound pick-up transducer disposed in the exhaust passage of the engine or a chamber communicating with the exhaust passage for the purpose of detecting exhaust sound, an integrating circuit for |
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