| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a self-diagnosable electronic circuit and a magnetic field detection device having higher reliability than conventional ones. <P>SOLUTION: A self-diagnosable electronic circuit comprises: a detection circuit 21; an operational amplifier 23 for amplifying a detection signal output from the detection circuit; a multiplexer 22 connected between the detection circuit and the operational amplifier; a microprocessor 24 for arithmetically processing a detection signal output from the operational amplifier; and a diagnosis circuit 25 for generating a first diagnosis signal at a high voltage and a second diagnosis signal at a low voltage. The diagnosis circuit 25 is connected to the multiplexer 22, so that the diagnosis signals 32 and 33 selected by the multiplexer 22 may be input to the microprocessor 24 through the operational amplifier 23. The microprocessor 24 may diagnose, on the basis of the first diagnosis signal and the second diagnosis signal, whether or not the electronic circuit is normally functioning. <P>COPYRIGHT: (C)2012,JPO&INPIT |
