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Questions and Answers
What is the main purpose of an SR latch in digital circuits?
What is the main purpose of an SR latch in digital circuits?
Output Q and output $ar{Q}$ of an SR latch are the same.
Output Q and output $ar{Q}$ of an SR latch are the same.
False
How many NAND gates are used in a typical SR latch circuit?
How many NAND gates are used in a typical SR latch circuit?
Two
In an SR latch, the input lines are labeled as S and ______.
In an SR latch, the input lines are labeled as S and ______.
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Match the components of an SR latch with their functions:
Match the components of an SR latch with their functions:
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Study Notes
Logic Circuit: SR Latch
- The circuit uses two NAND gates to create a set-reset (SR) latch.
- Input signals 'S' and 'R' control the latch's state.
- 'S' stands for set, while 'R' represents reset.
- Output signals 'Q' and 'Q̅' (not Q) are the latch's outputs.
- The circuit design features a cross-connected feedback loop formed by the NAND gates' outputs feeding their inputs.
- This feedback loop produces the latch's bistable characteristic.
- When S = 1 and R = 0, the output Q is 1 (set).
- If S = 0 and R = 1, the output Q is 0 (reset).
- The SR latch can be in a stable state only in two situations.
- These states are 10 (Q=1) and 01 (Q=0).
- Any other combination of S and R would transition the output resulting in an indeterminate state of the latch.
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Description
This quiz explores the design and functionality of the SR latch using NAND gates. It examines how the input signals 'S' and 'R' influence the latch's output states and the concept of bistability in digital circuits. Understanding these principles is crucial for mastering basic logic circuit designs.
