Transistor Equivalents of Logic Gates

Transistor equivalents of AND, OR, NOT Gates, which are the basic Logical gates, are shown in the picture.

When very few logical gates should be used in electronic systems;

For example, if only one NOT port is to be used, there is no need to use an integer with 74 Series 6 groups of NOT ports. A single transistor is designed with one NOT gate. Thus, the other 5 NOT gates in the IC will not be idle.

The same is true for other Logical gates. When only one or two of the OR, AND logical gates are to be used, there is no need to use a whole integrator. It is more economical and ergonomic to establish circuits with transistor equivalents of AND and OR gates.

Similar designs can be used for NAND and NOR. E.g; NAND is obtained if a single transistor NOT gate is connected to the output of the two-transistor AND gate. NOR is obtained if a single transistor NOT gate is connected to the output of the two-transistor OR gate.
In the circuit in the picture, 2N2222, a general use transistor used mostly for switching purposes, is used as the transistor.