Practice Floating And Unused Inputs (5.3.10) - Logic Families - Part C
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Floating and Unused Inputs

Practice - Floating and Unused Inputs

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What happens to a floating input in TTL logic?

💡 Hint: Think about the nature of reverse bias in diodes.

Question 2 Easy

Should unused inputs of AND gates be left floating?

💡 Hint: Consider how noise can affect circuit performance.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What happens when inputs of TTL devices are left floating?

They act like logic LOW
They act like logic HIGH
They have no effect
They short circuit

💡 Hint: Think about the nature of diode behavior in TTL.

Question 2

Unused inputs of NAND gates should be tied to:

Ground
VCC
Either A or B
None of the above

💡 Hint: Consider how these inputs affect the logic circuit.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

You have a TTL NAND gate with two unused inputs. Describe how you would configure them to ensure reliable operation, considering noise levels.

💡 Hint: Think about how external signals affect your circuit.

Challenge 2 Hard

Given a digital circuit involving several NAND and OR gates, explain the implications of not terminating unused inputs.

💡 Hint: Consider how each gate interacts with digital logic.

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Reference links

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