Lecture 6 - ADC and DAC Exam
Questions and Answers
What occurs between amplification and further processing? - Answers -Analogue to
Digital Conversion
Why is digital so popular? - Answers --Miniaturization
-Cost
-Speed
-Less susceptible to noise and interference
What is a transistor? - Answers -A switch with ONLY off/on positions
How can a computer process information? - Answers --Reads high and low voltage
-On or Off
-Binary
What are characteristics of Analog Signals? - Answers -- Infinite Resolutions
- Value known at every time (continuous signals)
-Noise limits resolution
What are characteristics of Digital Signals? - Answers -- limited resolution
- value known at sampled times (discrete signals)
- less susceptible to noise and bandwidth limits
Nyquist Sampling Theorem - Answers -sampling frequency should be at least twice the
highest frequency presented in the sample to be able to reconstruct original sample
What happens when the sampling frequency is too slow/not twice as high? - Answers -
reconstruction is distorted
What is a bit? - Answers -Two to that power
Resolution equation with x bits and reference voltage - Answers -resolution= (Vmax-
Vmin)/2^x= Vref/2^x
Starting with Analog, what is the path of signal? - Answers -Analog signal input, ADC,
Control computer, DAC, analog signal output
Where is the most significant bit in a Resister to Resister Circuit? - Answers -End
closest to DAC out
Questions and Answers
What occurs between amplification and further processing? - Answers -Analogue to
Digital Conversion
Why is digital so popular? - Answers --Miniaturization
-Cost
-Speed
-Less susceptible to noise and interference
What is a transistor? - Answers -A switch with ONLY off/on positions
How can a computer process information? - Answers --Reads high and low voltage
-On or Off
-Binary
What are characteristics of Analog Signals? - Answers -- Infinite Resolutions
- Value known at every time (continuous signals)
-Noise limits resolution
What are characteristics of Digital Signals? - Answers -- limited resolution
- value known at sampled times (discrete signals)
- less susceptible to noise and bandwidth limits
Nyquist Sampling Theorem - Answers -sampling frequency should be at least twice the
highest frequency presented in the sample to be able to reconstruct original sample
What happens when the sampling frequency is too slow/not twice as high? - Answers -
reconstruction is distorted
What is a bit? - Answers -Two to that power
Resolution equation with x bits and reference voltage - Answers -resolution= (Vmax-
Vmin)/2^x= Vref/2^x
Starting with Analog, what is the path of signal? - Answers -Analog signal input, ADC,
Control computer, DAC, analog signal output
Where is the most significant bit in a Resister to Resister Circuit? - Answers -End
closest to DAC out
