Capacitive measuring circuit insensitive to high-frequency interference
作者： Marian Jozef Walter Slezak
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摘要: The invention relates to a measuring circuit for the capacitance of capacitor which has first and second electrode is coupled charging capacitor, wherein frequency output signal measure comprises buffer amplifier with point between resistor connected other components circuit. changes high impedance level combination at low-pass filters can usefully be applied. Buffer amplifiers are also available an input resistance such that already functions in itself as filter. An external filter then not necessary because present amplifier.
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