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The AND gate, to produce a high output signal then all input signals must be. 2/17/2013 13, V. CONCLUSION ? IC consist of some logic gate. In this section about Digital Logic Gates, we have seen that there are three main basic types of digital logic gate, the AND Gate, the OR Gate and the NOT Gate. NAND and NOR gates possess a special property: they are universal. That is, given enough gates, either type of gate is able to mimic the operation of any other.