use cmos transistors to bit a 4-bit adder. nand2 symbol schematic
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Use CMOS Transistors to bit a 4-bit Adder
NAND2
symbol
Schematic
Implementation of a Full Adder (ES210)
(carry-in)
Full Adder
• 2 Half Adder– XOR– AND
• OR
NAND-Based XOR Gate
schematic symbol
NAND-Based AND Gate
schematic symbol
NAND-Based OR Gate
schematic symbol
Full AdderSymbol
Test Bench For the Adder
Waveforms of the Full Adder
Four-Bit Adder
C4 is calculated last because it takes C0 8 gates to reach C4.Each FA uses 2 XOR, 2 AND and 1 OR gate.A four-bit adder uses 8 XOR, 8 AND and 4 OR gate.
Test Bench in Verilog
Create Config
Use Template
AMS Simulator
Model Library Setup
Use the 5 V Connect Rules
Choose Enough Levels of Hierarchy to Save
Output of the 4-bit AdderOpen database first!
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