SR NOR Latch
时间: 2024-05-23 15:14:32 浏览: 18
SR NOR Latch 是一种基本的数字电路,由两个交叉耦合的 NOR 门组成。它可以用来存储一个二进制位。SR NOR Latch 可以被设置为 0 或 1,也可以被保持在先前的状态。在 SR NOR Latch 中,当 S (Set) 输入为 1 且 R (Reset) 输入为 0 时,输出为 1;当 S 输入为 0 且 R 输入为 1 时,输出为 0;当 S 和 R 输入均为 0 时,输出保持不变。
相关问题
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.
A clocked SR latch is a type of flip-flop that is used to store a single bit of information and is synchronized by a clock signal. Unlike the basic SR latch, the clocked SR latch has an additional input, the clock input, which controls when the inputs S and R are allowed to affect the output Q.
The circuit diagram of a clocked SR latch is shown below:
```
_____
S ----| |
| |
| |-----Q
| | |
| |____|
|
| _____
| | |
| | |
|------| |-----Q'
| |_____|
|
|
CLK --|_______|
```
In the diagram, S and R represent the set and reset inputs, respectively, and Q and Q' represent the complementary outputs of the latch. The clock input is denoted by CLK.
When the clock input is high, the latch is said to be "transparent," because any changes to the S and R inputs will immediately affect the output Q. When the clock input is low, the latch is said to be "latched," because the output Q is "latched" or held at its current state until the clock input goes high again.
Here's how the clocked SR latch works:
1. When the clock input is high, the latch is transparent, and the outputs Q and Q' will follow the inputs S and R, respectively.
2. When the clock input goes low, the outputs Q and Q' are latched at their current state.
3. While the clock input is low, any changes to the inputs S and R will not affect the outputs Q and Q'. Instead, the changes will be "stored" in the circuit, and will only affect the outputs when the clock input goes high again.
4. When the clock input goes high again, the latch becomes transparent once more, and the outputs Q and Q' will immediately follow any changes to the inputs S and R.
Overall, the clocked SR latch is a useful circuit for storing a single bit of information in a synchronized manner, and is commonly used in digital circuits such as microprocessors and memory systems.
describe in your own words how an SR latch works . Your answer must also include a labelled schematic diagram of your SR latch
An SR latch is a basic digital logic circuit that can store a single bit of information. It is made up of two cross-coupled NAND gates, which are connected in such a way that the output of each gate is connected to the input of the other gate. The circuit has two inputs, S and R, which are used to set and reset the latch, respectively.
When S is set to 1, the output of the first NAND gate goes to 0, which is then connected to the input of the second NAND gate. This causes the output of the second NAND gate to go to 1. At this point, the latch has been set and will remain in this state until the R input is activated.
When R is set to 1, the output of the second NAND gate goes to 0, which is then connected to the input of the first NAND gate. This causes the output of the first NAND gate to go to 1. At this point, the latch has been reset and will remain in this state until the S input is activated.
The circuit diagram of an SR latch is shown below:
```
_____
S ---| |
| NAND|--Q
Q'---|_____|
_____
R ---| |
| NAND|--Q'
Q ---|_____|
```
In the diagram, Q and Q' represent the complementary outputs of the latch, whereas S and R are the set and reset inputs, respectively. When both S and R are set to 0, the latch is in an undefined state and the outputs can be either 0 or 1 depending on the initial conditions.
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