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TC9401 датащи(PDF) 14 Page - Microchip Technology

номер детали TC9401
подробное описание детали  Voltage-to-Frequency/Frequency-to-Voltage Converters
PDF  24 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC9401 датащи(HTML) 14 Page - Microchip Technology

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TC9400/9401/9402
DS21483C-page 14
© 2006 Microchip Technology Inc.
6.0
FREQUENCY-TO-VOLTAGE
(F/V) CIRCUIT DESCRIPTION
When used as an F/V converter, the TC9400 generates
an output voltage linearly proportional to the input
frequency waveform.
Each zero crossing at the threshold detector’s input
causes a precise amount of charge (q = CREF ∞ VREF)
to be dispensed into the op amp’s summing junction.
This charge, in turn, flows through the feedback resis-
tor, generating voltage pulses at the output of the op
amp. A capacitor (CINT) across RINT averages these
pulses into a DC voltage, which is linearly proportional
to the input frequency.



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