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Author Topic: fast measure of capacitance  (Read 1179 times)
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ktek
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« on: May 14, 2011, 05:31:58 17:31 »

Hi all !

some idea of how to measure capacitance and inductance in less than   < 2ms?
• 1μH 100μH precision (0.1 uH)
• 0.1 pF 10 pF precision (0.1 pF)
I tried the Analog Device chip like AD7150 AD7152 AD7153 & AD5933  but all are too slow.

any suggestion is welcome?
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oldvan
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« Reply #1 on: May 14, 2011, 07:37:38 19:37 »

Perhaps the CTMU in one of the Microchip PIC24F series or similar?















EDIT:  TYPO
« Last Edit: May 15, 2011, 05:47:11 05:47 by oldvan » Logged

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solutions
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« Reply #2 on: May 15, 2011, 02:51:49 02:51 »

TDR
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Tanuki
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« Reply #3 on: May 22, 2011, 11:28:27 23:28 »

Use a LC tank oscillator (i.e. Colpitts) and count the cycles for 1 or 2 milliseconds.
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