vc wave select

[WeAreAs1 at aol.com]

Ingo asks:

<< How can a 4 bit (i.e. 16 step) ADC made with only one TL074? >>

When each of the opamps is configured as a comparator, using the output of
each opamp, cleverly fed back through a network of resistors, to instantly
change the threshold voltages of each opamp, dependant on the current state of
the total 4-bit output.

To see the schematic, and to read John Simonton's much more cogent
explanation, go to:

http://www.paia.com/ek7.htm

Michael Bacich