Data Acquisition Block Diagram

The data acquisition of a band-limited signal has the following broad steps:

1. DC removal



2. 2-bit ADC (0.5 MHz speed)




Collect 4 such samples at one time (for simplicity, copy the same signals 4 times)




3. Build a sampler, of 0.5 MHz.




One could take 10 MHz signal, and use every 20th pulse (simple counter) for sampling.




4. Put together four 2-bit samples on a bus with an isolator for i/o.



5. Feed the signal to the data acquisition card sitting in the PCI slot of a PC.