555 Linear voltage / frequency converter circuit 3

Published:2011/9/18 21:48:00 Author:Ecco | Keyword: 555, Linear voltage , frequency , converter | From:SeekIC

As shown in Figure 5-36, the linear voltage/frequency converter is a practical voltage/frequency converter. When added to the input voltage, the voltage on C1 increases linearly, when it is reached 2/3 VDD, the 555 flip sets, VT1 is conducted, C1 quickly discharges. Round trip time is also associated with the R5,C3 time constant, that is, when the voltage of C3 decreases to 1/3 VDD, the 555 sets. VT1 is cut off, then it starts the next time. The circuit's return time is about 1μs. When the frequency is over 10KHz, the nonlinear error is about 0.2%.



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