| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an adjustable integrator which increases a measurable amount of electric charge by an integrating amplifier, limits the number of external capacitors to one, increases an input range of electric charge, and adjusts the input range, and to provide a method of manufacturing the adjustable integrator. Ž<P>SOLUTION: The adjustable integrator includes: an amplifier 21a with an input and an output, in which a signal is supplied to the input of the amplifier and an amplified signal is provided at the output; first feedback loops 21a, 22a, 22b and 22c so connected between the output and the input and provided with a capacitor 22a as to supply a first current to provide an electric charge to the capacitor that provides an integration of the first current; and second feedback loops 21a, 27 and 21b connected between the output and the input to provide a mirror current of the first current and feed back the mirror current to the input so that an input range of the electric current can be enhanced. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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