Cyclic A/D converter circuit

  
The cyclic converter consists of a chain of identical stages, each of which detects the polarity of the input. Step V REF then subtracted from the double entry and the rest if the polarity is correct. The signal is full wave rectified and the rest of V IN - V REF is doubled.

Cyclic A/D converter circuit - img1

A string of these steps provides the equivalent gray code input voltage digital form related to the magnitude of V REF 'accuracy with high potential, the circuit using NE531 devices installed.




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