TTL NOR and OR gates

Chapter 3.6 TTL NOR and OR gates

Lessons In Electric Circuits Volume IV – Digital Book
Pages 501
Views 5,154
Downloads : 9 times
PDF Size : 2.6 MiB

Summary of Contents

Lessons In Electric Circuits Volume IV – Digital Book

  • 64CHAPTER 3. LOGIC GATESInputAInputBOutputA BOutput000101111AND gateEquivalent circuitInputAInputBOutput000Of course, both NAND and AND gate circuits may be designed with totem-pole output stagesrather than open-collector. I am opting to show the open-collector versions for the sake of simplicity.• REVIEW:• A TTL NAND gate can be made by taking a TTL inverter circuit and adding another input.• An AND gate may be created by adding an inverter stage to the output of the NAND gatecircuit.3.6TTL NOR and OR gatesLet’s examine the following TTL circuit and analyze its operation: