Complete the timing diagram for the gated latch shown below. R $ R EN O Q is initially HIGH S EN Q Q
Complete the timing diagram for the gated latch shown below. R $ R EN O Q is initially HIGH S EN Q Q
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
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
Transcribed Image Text:### Gated Latch Timing Diagram
**Objective:**
Complete the timing diagram for the gated latch depicted in the schematic.
**Schematic Explanation:**
The diagram shows a gated latch with the following logic gates and inputs:
- **R**: Reset input
- **S**: Set input
- **EN**: Enable input
- **Q**: Output
- **\(\overline{Q}\)**: Complement of the output (Q bar)
The gated latch consists of:
- Two AND gates, each taking EN and either S or R as inputs.
- A NOR gate and an OR gate to determine the outputs Q and \(\overline{Q}\).
**Timing Diagram:**
The timing diagram specifies the sequence and interaction of signals over time. It consists of horizontal lines representing the following signals, from top to bottom:
- **S**
- **R**
- **EN**
- **Q** (Output, initially HIGH as specified)
Each line depicts transitions between HIGH (1) and LOW (0) states over a sequence of time intervals. The values change in response to the inputs and the state of the enable signal.
**Key Observations:**
- When EN is LOW, changes in S and R do not affect the state of Q; it retains its previous state.
- When EN is HIGH, the state of Q is influenced by the S and R inputs:
- If S is HIGH and R is LOW, Q becomes HIGH.
- If R is HIGH and S is LOW, Q becomes LOW.
- If both S and R are LOW, Q holds its previous state.
- If both S and R are HIGH simultaneously, the output state can be indeterminate depending on the latch design.
**Conclusion:**
This timing diagram helps in understanding how the gated latch responds to various input combinations, with specific focus on the enable signal's role in controlling the state transitions.
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