Circuit Diagram Of And Gate Using Transistor. The transistors are connected in series and their bases are used as input. Both the transistors t1 and t2 are connected in serial with each other like the nand gate circuit and also the circuit somewhat resembles the nand gate circuit built using.
If it made by using diodes then it called dl diode logic and if using transistors it called rtl resistor transistor logic. The transistors used in this tutorial are bc547 npn transistor and were added with all the above mentioned components in the circuit as shown below. The small base current controls the larger collector current.
When the switch is closed a small current flows into the base b of the transistor.
Initially both the switches are in off state so none of the transistor. The below diagram represents the above explained circuit to build an and gate using npn transistor. The small base current controls the larger collector current. The base of both the transistors act like inputs and one of the emitter of either of the transistors is used to derive the output.
