The three types of ADCs that do not use a DAC as part of the conversion process are:
A) flash ADC, digital- ramp ADC, and dual- slope ADC.
B) successive- approximation ADC, digital- ramp ADC, and dual- slope ADC.
C) flash ADC, voltage- to- frequency ADC, and dual- slope ADC.
D) digital- ramp ADC, tracking ADC, and dual- slope ADC.

Question

Quizplus · Accepted Answer

Flash ADC, voltage-to-frequency ADC, and dual-slope ADC do not inherently require a DAC for their conversion process. Flash ADCs convert an analog input to a digital output directly using comparators. Voltage-to-frequency converters change the analog input into a varying frequency signal, which can then be easily measured digitally without a DAC. Dual-slope ADCs integrate the input voltage over a period and then measure the time it takes to return to zero, also not requiring a DAC.

The Three Types of ADCs That Do Not Use a DAC