Lab
X - ECE 421L
Authored
by Tian Chen
9/8/2020
chent5@unlv.nevada.edu
Prelab:
We load the lab2 demo file into virtuoso and run the simulation of it here is the schmatic.
![](lab2/prelab_circuit.PNG)
And we load the state of the simulation and we got this graph.
![](lab2/prelab_sim.PNG)
Lab 2:
We will need to build our own DAC the first step is to build the induvial DAC bit and here is the schematic.
![](lab2/DACbit1.PNG)
And we make the symbol out of this and we got this.
![](lab2/DACbit2.PNG)
After this step we will use the single bit to make a 10 bit DAC, and here is the schematic.
![](lab2/DAC10bit1.PNG)
We will need to make a symbol out of this DAC.
![](lab2/DAC10bit2.PNG)
After that we can put the DAC we build into the schematic and test the performace of it. ![](lab2/ADCDAC1.PNG)
Here is the simulation result of the DAC that we build.
![](lab2/ADCDAC2.PNG)
And now we are going to test the delay response when we add a cap on the output
![](lab2/DACcap1.PNG)
![](lab2/DACcap2.PNG)
We got it the 1/2t = 0.7RC
Then we are putting a resistor in the end to see if it will pull the signal down
![](lab2/ADCDACres1.PNG)
![](lab2/ADCDACres2.PNG)
Then we are putting a cap between the Vout and the cap to see if that will smooth out the signal.
![](lab2/ADCDAC_withcap1.PNG)
![](lab2/ADCDAC_withcap2.PNG)
And i back this up at my google drive
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