| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an interface device of a gas sensor capable of obtaining an output which precisely corresponds to the concentration of a specific gas component of a gas to be measured. <P>SOLUTION: The interface device comprises: a resistor 45 through which current being output by an all-area oxygen sensor 1 flows; a first switching section 53 which switches a transmission state and a non-transmission state, i.e., the voltage at one end of the resistor 45 is transmitted or is not transmitted; and a second switching section 55 which can be brought in its on state during the non-transmission state of the first switching section 53 and makes differential amplifier sections (60, 56, 57, 58 and 59) have a continuity between their first polarization sides and second polarization sides. <P>COPYRIGHT: (C)2007,JPO&INPIT |
