| 摘要 |
A resistance feedback circuit has a storage section which stores a feedback gain calculated in advance, a resistance value obtained from a detection section, and a time at which the resistance value is obtained. A computing section has a gain setting section which calculates an amount of change in a resistance value in a predetermined time from the resistance value and the time stored in the storage section, and calculates the feedback gain based on the change in the resistance value calculated, and replaces the feedback gain which is calculated in advance.
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