EXP.NO: 8
DATE: 15.02.2024
DESIGN AND SIMULATION OF LINEAR CARRY SELECT
ADDER AND WALLACE TREE MULTIPLIER USING CADENCE TOOL
AIM:
To design and simulate the following circuits in cadence EDA tool.
1) Linear Carry Select adder.
2) Wallace tree multiplier
TOOL USED:
Cadence Virtuoso 6.1.8 – Cadence schematic tool and ADE L for analysis
PROCEDURE:
To create cell view in a new library
1. Open the terminal and type the following commands
>>csh
>>home/cad/cshrc
2. A “Welcome to Cadence Suite” appears. Now type “virtuoso &” and
press enter after checking network connectivity.
3. Library Manager work area window opens.
4. Create a new library as follows. File > New > Library and type the name
of the library.
5. A technology file Tab opens, select attach to existing technology library.
Another window opens, now select gpdk180 – general purpose digital kit
180 nm.
To create the Schematic and Symbol of Adder and Multiplier:
1. Now select the “vlsidesignlab_kk” library. Go to file→new→cell view and
give a cell name(here, cell name is eg: lcsa). Make sure that the ‘Type’ is
in schematic mode, ‘view’ is set to schematic and the library file name is
included in it.
2. On clicking OK, Schematic L: Editing Window opens.
3. Create the schematic of circuit and check and save the schematic.
4. Click on Check and Save.
5. Click on launch→ADE L. An ADE L tab opens.
6. Give the values of inputs, vdd and gnd in stimuli.
7. Click analysis and set to transient analysis.
8. In the ADE L tab, go to Outputs→Outputs to be plotted, select on the point
where the output is needed to be found.
9. Click on the Green run button to generate netlist and run.
10. The result waveform will appear
LINEAR CARRY SELECT ADDER:
a) RIPPLE CARRY ADDER:
SCHEMATIC:
STIMULI:
OUTPUT:
LINEAR CARRY SELECT ADDER:
SCHEMATIC:
STIMULI
OUTPUT:
WALLACE TREE MULTIPLIER:
SCHEMATIC:
AND gates for partial products
STAGE 1:
STAGE 2:
STAGE 3:
OUTPUT:
RESULT:
Thus, Linear Carry Select Adder and Wallace tree Multiplier are designed and
simulated using Cadence EDA tool.