4. Dynamic magnetic information storage or retrieval
  5. Automatic control of a recorder mechanism
  6. Controlling the head

Fuji Electric Device Technology Co. Ltd.

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Amplifier circuit

Amplifiers – With semiconductor amplifying device – Including differential amplifier
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Control method for switching power supply circuit

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
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Copyright protection system, digital information processing...

Information security – Prevention of unauthorized use of data including prevention...
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DC to DC converter and voltage detecting circuit and current...

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – By periodic switching
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DC-DC converter and method of controlling thereof

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
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