Bjt Circuit Diagram. The construction and circuit symbols for both the pnp and npn bipolar transistor are given above with the arrow in the circuit symbol always showing the direction of conventional current flow between the base terminal and its emitter terminal. While the first transistor was invented 70 years ago but till now it changed the world from mysterious big computers to small smartphones.
Bjt layers a bipolar transistor consists of a three layer sandwich of doped extrinsic semiconductor materials a and c either p n p or n p n b and c. The transistor will operate as an amplifier or other linear circuit if the transistor is biased into the linear region. Symbol of bjt transistors let s start with the symbol of transistors so that you can identify them in a circuit.
I b is the base current.
There are two types of current gain in bjt i e. The below diagram shows the symbols of the two types of transistors. Bjt layers a bipolar transistor consists of a three layer sandwich of doped extrinsic semiconductor materials a and c either p n p or n p n b and c. Bipolar junction transistors also known as bjts can be used as an amplifier filter rectifier oscillator or even a switch which we cover an example in the first section.
