| 摘要 |
PROBLEM TO BE SOLVED: To provide a two-wire system transmitter able to back up integrated data, even when an ambient temperature gets low or even when a back-up data volume increases by a design change, with respect to the two-wire system transmitter. SOLUTION: This two-wire system transmitter detecting a physical quantity by a physical quantity detecting part, and supplied with a transmission current in response to the physical quantity, is provided with: an excessive current change detection part for detecting a change of an excessive current that is a part of the transmission current, and for outputting a detected change detection signal; and a computation control part for storing the integrated data integrated with the physical quantity into a storage part, based on the change detection signal. COPYRIGHT: (C)2009,JPO&INPIT
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