And Gate Transistor Circuit. So the output voltage at the collector pin of q3 goes 0v by dropping of voltage with the ground at r2. When the input is high vs the output is low 0v.
Push buttons normally open 5x wires jumper wires. In the above circuit when a or b or both a and b are grounded or at 0v potential transistor t 1 or t 2 or both t 1 and t 2 are in off condition respectively. When both input to the and gate are forced to a logic high 1 level the output will be forced to a logic high 1 level.
In the common emitter configuration transistor gives a phase shift of 180 degrees.
Designing or gate using transistor as many of us know an integrated circuit or ic is a combination of many small circuits in a small package which together performs a task. 2x 10k ohm resistors. Both transistors must be saturated on for an output at q. For building an and logic gate using a transistor we would be using bjt transistors which can be further classified into two types.
