amdkicksass
Member
Hi guys, as one of my school projects i am going to need to design a Analog to digital converter. Thew specification i have to follow are as follows:
1. 100khz max input frequency
2. max number of bits are 8
3. successive approximation type.
4. discrete device except counting and D/A return.
The device should be pretty basic in design and construction and cannot include and micro controllers or ICs other than the ttl74 and cmos 4000 series.
After doing some research, i was thinking of creating an oscillator for a clock and having the analog signal go to a 74191 up/down counter and feed that thru a R2R DAC for the comparator feedback. The output would also go to some kind of successive approximation register & parrallel to serial conversion.
Any ideas ? suggestions?
THhanks
Pete
1. 100khz max input frequency
2. max number of bits are 8
3. successive approximation type.
4. discrete device except counting and D/A return.
The device should be pretty basic in design and construction and cannot include and micro controllers or ICs other than the ttl74 and cmos 4000 series.
After doing some research, i was thinking of creating an oscillator for a clock and having the analog signal go to a 74191 up/down counter and feed that thru a R2R DAC for the comparator feedback. The output would also go to some kind of successive approximation register & parrallel to serial conversion.
Any ideas ? suggestions?
THhanks
Pete