Abstract A detachable operating unit for connection with a main unit comprises at least two power supply units for applying operating voltages to the detachable operating unit, the power supply units generating two different voltages, respectively; at least two power supply terminals for engaging the detachable operating unit and the main unit to receive two different voltage applied to the power supply units, respectively; a ground terminal for engaging the detachable operating unit and the main unit; a protective circuit for applying a reverse voltage in response to a differential voltage between voltages of the power supply units, the protective circuit being disposed between one of power supply units which generates the operating voltage lower than that of the other power supply unit, and the ground terminal.
Inventors
👤 Seiji C/O Pioneer Electronic Corporation Kato
👤 Kazuhiro C/O Pioneer Electronic Corp. Kiyoura
Bibliographic Details
Application Number—
JurisdictionEP
Data Sourcegoogle_patents
Last Synchronized2026-11-08 14:46
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/001; H02H9/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A detachable operating unit for connection with a main unit comprising: at least two power supply units for applying operating voltages to said detachable operating unit, said power supply units generating two different voltages, respectively; at least two power supply terminals for engaging said detachable operating unit and said main unit to receive two different voltage applied to said power supply units, respectively; a ground terminal for engaging the detachable operating unit and said main unit; and a protective circuit for applying a reverse voltage in response to a differential voltage between voltages of said power supply units, said protective circuit being disposed between one of said power supply units which generates said operating voltage lower than that of the other said power supply unit, and said ground terminal.
Claim 2
Dependent Claim
26 words
A protective circuit as claimed in claim 1, wherein said protective circuit comprises a diode connected between said power supply and ground terminal with reverse polarity.
References Cited (Backward Citations)
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