Analog to Digital

304

02:26:14

my guess attempt of successive approximation a/d conversion. this version bit slow for now.. may work out a faster/efficient way to implement this

this version: starts with all bits low, cycles through 7 bits from msb to lsb, toggles bit on and compares analogue output to target input, toggles bit back off if greater than target, repeats for next bit. Results will be lower (or equal) to input

you can slow down the sim speed to visually see how the circuit is getting a 'feel' for the analogue input and adjusting itself as it decrements its values along, that's what the scope and the right 7 segment display is showing. fun to watch me thinks :) 

published 8 years ago

BillyT

8 years ago

Appears to work well, early 8 & 10 bit A to D circuits that I worked with worked this way, lot higher clock speed but sample rate and hysteresis were adjustable as required.

roops1967

8 years ago

Thanks good to knowr :)

maxmax_66

8 years ago

Clever. Nicely done.

roops1967

8 years ago

Cheers max

lesliecaminade

7 years ago

This is very nice we can see each approximation very clearly. Thanks :)

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