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- The AND gate gives an output only
**when all its inputs are present.**
- The AND gate has a 1 output when both
**A and B **are 1. (all-or-nothing gate).
- The output of an AND gate will be
**true ** only if **all its inputs are true. **Its output would be false if **any **of its inputs is false.
- The AND gate works on the Boolean algebra –
- It is logical multiplication and is different from the arithmetic multiplication
- The output C is q only when both A and B are 1
- The output C is true only when both A and B are true.
- According to Boolean algebra, the AND gate performs logical multiplication on its inputs
- 1. A.1 = 1 2. A.0 = 0
- 3. A.A = A

**THE NOT GATE**

- It is so called because its output is NOT the same as its input.
- It is also called an inverter because it inverts the input signal.
- It has one input and one output.
- The schematic symbol for inversion is a small circle.
- The logical symbol for inversion is a bar over the function to indicate the opposite state.

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