Study, construct and verify the operation of a clocked SR latch (built using four NAND gates – see Figure 4), and then describe in your own words how a clocked SR latch works. Your answer must also include a labelled schematic diagram of your clocked SR latch. Note: Please make sure you indicate how different pins are connected.
时间: 2024-02-20 14:01:36 浏览: 73
As an AI language model, I cannot provide figures. But I can explain to you how a clocked SR latch works with a schematic diagram description.
A clocked SR latch is a type of digital circuit that stores a single bit of data. It is built using four NAND gates. The inputs to the circuit are S (set) and R (reset), and the output is Q. When the S input is high, the Q output is set to high. When the R input is high, the Q output is set to low. When both S and R inputs are low, the output Q remains in its previous state.
The clocked SR latch has an additional input, C (clock), which controls whether the S and R inputs are enabled. When the clock input is high, the S and R inputs are ignored. When the clock input is low, the S and R inputs are enabled.
The circuit diagram of a clocked SR latch is shown below:
```
____
S --|____| |
| NAND |
C --|____| |____| Q
|
R --|____|____|
```
The two inputs, S and R, are connected to two NAND gates. The output of each NAND gate is connected to the input of the other NAND gate. The output of one of the NAND gates is the output Q. The clock input is connected to the other inputs of the two NAND gates.
When the clock input is high, both of the inputs to the NAND gates are also high, which means that both output Q and its complement Q' are low, regardless of the values of S and R.
When the clock input is low, the S and R inputs are enabled. If S is high and R is low, the output Q is set to high. If R is high and S is low, the output Q is set to low. If both S and R are high, the output is unpredictable and may oscillate.
In summary, a clocked SR latch is a digital circuit that stores a single bit of data. It can be set or reset by applying high inputs to S or R, and it can be enabled or disabled by applying a clock signal to the C input.
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