Because two diodes is not a transistor. There is an interaction between the junctions in the transistor, because of their proximity, that you don't get in the two diodes. The only use of modeling a transistor as two diodes back to back is to test a transistor with a multimeter as a quick go-nogo test for basic operability.
uni junction transistor
A sexy transistor are two type. NPN and PNP..... c means common b means base .
there are two diodes there but to use them as rectifiers never
A CPU operates in real mode and protected mode
CPU switching from process to another
CPU(central processing unit) is a brain of computer,It processes the data using the registers inside the CPU. A CPU is like a light switch and has two basic functions OFF and ON. which brings us to binary all those 0's and 1's the only language the CPU understands the 0 being OFF and the 1 being ON there are millions of switches inside the CPU moving from OFF to ON millions of times a second processing all the information you give it.
The main use of transistors in electronic circuits is as switches and memory storage
two The transistor has one depletion layer.
A Darlington transistor is a composite transistor. The definition is a combination of two or more transistors that have the purpose of increasing the current gain.
no
You cannot build a transistor with two diodes. Even though the static junction characteristics of a transistor "looks like" two back to back series diodes, there is a relationship between the two junctions that cannot be matched by just connecting two diodes together.
When investigated with an ohm-meter, a transistor resembles two diodes connected "back-to-back". But you can't make a transistor by connecting two diodes back-to-back.
Because two diodes is not a transistor. There is an interaction between the junctions in the transistor, because of their proximity, that you don't get in the two diodes. The only use of modeling a transistor as two diodes back to back is to test a transistor with a multimeter as a quick go-nogo test for basic operability.
In fact, the antecessor of transistor was the diode. Transistor is an abbreviation for "Transfer resistor, A transistor is formed by the combination of two diodes,and the first diodes were made of germanium to allow current flows on one direction and blocking it on the reverse direction. Transistor was the basis for the real development of electronic technologies, but the main material inside of it, that started with germanium, today is used silicon, and graphene is the newest material that promises to replace silicon with many important physical features.
A Darlington pair uses two transistors connected to behave as a single transistor with a very high current gain (beta). Transistor-1 has its collector connected to the collector of transistor-2. Transistor-1 has its emitter connected to the base of transistor-2. The base of transistor-1 with the emitter and collector of transistor-2 is used as a single transistor.
uni junction transistor