Lab 2 - EE 421L 

Authored by Russ Prado,

prador@unlv.nevada.edu

09/14/2015

Pre-Lab

Lab description:

 Use the n-well resistors to implement a 10-bit DAC

Design of a 10-Bit Digital-to-Analog Convertor(DAC)

Step 1:

Download and unzip the schematic files, lab2.zip, onto Cadence

Step 2:

Open the Ideal ADC-DAC schematic, then run a transient analysis for 1us

Post-Lab

Step 3:

This part of the lab will be using the following layout but using 10-Bits instead.

Step 4:

Step 5:

Create a symbol using the "2R_Res" schematic using the Create>Cellview>from Cellview.

Step 6:

Now we will create our design of the 10-Bit DAC using the 2R_Res symbol we created. Make a copy of the Ideal_10-bit_DAC and rename it to "MyDesign_10-Bit_DAC". Delete everything in this new schematic. Place 10 of the 2R_Res symbols in series. Don't forget to add a 10k resistor and ground on one end of the series and the an output pin on the other end. Finally Check & Save.


Part 7:
Open the symbol of MyDesign_10-Bit_DAC. Then delete the VDD, Vrefm, and Vrefp.


Part 8:
Test the your 10-Bit DAC design by putting a 5V input onto B_9 while the other DAC inputs are grounded.

Part 9:
Create a copy of of sim_Ideal_ADC_DAC and rename it as "sim2_Ideal_ADC_DAC". Open its schematic and replace the current DAC with MyDesign_10-Bit_DAC. Then run the Transient response. Run this schematic with no load, R, C, and RC:
I. No Load

II. 10k Resistor

III. 10pF Capacitor

IV. 10k Resistor and 10pF Capacitor

 
Part 10:
With the files on my desktop, I compress them into a zip file and send it to my email to keep a back-up.

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