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Title:
SWITCH CIRCUIT
Document Type and Number:
Japanese Patent JP3180056
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To obtain a switching circuit realizing asymmetrically of control where the circuit is controlled to be open on the occurrence of a fault by combining pluralities of semiconductors so as to configure the circuit provided with a function substituting relay functions and specifying the control.
SOLUTION: A 1st switching circuit connects in series with a midway of a signal line, consists of semiconductor switches A1, A2, a 2nd switching circuit connects in parallel with the 1st switching circuit and consists of semiconductor switches B1, B2. A signal source generates a signal S for investigating the operation of each semiconductor switch. Then a control section provides an output of a control signal by which any of the 1st and 2nd switching circuits is made open at all times and each switch is controlled to ensure a signal transfer path to the signal line, each switch in the switching circuit not in the closing state is sequentially switched to apply an operation check signal S to each switch in operation and each operation check state of each switch in the operation is outputted from an output terminal.


Inventors:
Hasegawa, Yosuke
Application Number:
JP1997000151309
Publication Date:
June 25, 2001
Filing Date:
June 09, 1997
Export Citation:
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Assignee:
KYOSAN ELECTRIC MFG CO LTD
International Classes:
H03K17/00; H03K17/687; (IPC1-7): H03K17/00
Attorney, Agent or Firm:
荒船 博司