| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent turbulence of the waveform of the current of magnitude, corresponding to the gas concentration flowing in a latter stage circuit, when intermittently applying the power supply of the latter stage circuit of an electrochemical gas sensor. <P>SOLUTION: When CO concentration in the circumference atmosphere of the electrochemical CO sensor 1, where the power switch SW is turned off by control of μCOM40 is not measured, electrons (2e<SP>-</SP>) generated in the detection pole 31 of a proton-conductor film 3, according to the CO concentration in the circumference atmosphere of the electrochemical CO sensor 1, are moved to a counter electrode 32 located between the drain and the source of an field effect transistor FET that has gone into a conductive state, without the reverse bias being able to apply to the gate by a base voltage of 0V supplied from a base voltage generation circuit 30, and are prevented from retaining in the detection pole 31, as it is. <P>COPYRIGHT: (C)2008,JPO&INPIT |
