Update for 15-11-21 15:45

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Tyler Perkins 2021-11-15 15:45:01 -05:00
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== Overview == == Overview ==
=== Parallel ===
1) Analog voltage is converted to a codeword, by running the voltage through a 1) Analog voltage is converted to a codeword, by running the voltage through a
series of comparators, each tied to a different voltage series of comparators, each tied to a different voltage
2) The series of codewords are put through a series of logic gates that convert
the code words to a n-bit value, ranging from 0V to VREF
- ie. VREF = 5V, 10-bit ADC, each step is 5/(2^10) = 4.9mV
This is a very fast way to implement a ADC, however for a n-bit resolution it
requires 2^n - 1 comparators, and 2N resistors (for voltage dividers) to
convert the signal
=== Counting ===
1) Compare the analog input voltage to an output from a [[DAC]]
2) Each time a comparison fails, increment a counter
3) When the [[DAC]] voltage is larger than the analog voltage, we have found the
correct value

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tech/DAC.wiki Normal file
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= DAC =
A Digital to Analog Converter (DAC) is a type of circut that converts a digital
signal to a voltage somehwere between GND and VREF (usually VCC). A common
use of a DAC is when converting digital music to a sound signal
== Overview ==
1) A voltage divider (resistors in series) split the VREF into equal parts