Published:2009/6/30 5:54:00 Author:May | From:SeekIC
Circuit Notes
The converter generates an output vol-tage which is linearly proportional to the input frequency waveform. Each zero crossing at the comparator's input causes a precise amount of change to be dispensed into the op amp's sum-ming junction. This charge in turn flows through the feedback resistor generating voltage pulses at the output of the op amp.Capacitor (CINT) across Rtxt averages these pulses into a dc voltage which is linearly proportional to the input frequency.
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