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Can you do amplification without transistor and is it possible to design oscillator using diode?

Magnetic amplifiers and vacuum tubes don't need transistors to amplificate electricity current. You can get a transistor by two oppositely connected diodes.


Why dont we get the transister action 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.


How many diode makes one transistor?

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.


How can you designed transistor using diode because no available transistor?

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.


The metal lead of p type of one pn diode connected to the metal lead of p type of another pn diode makes a npn transistor?

No. You cannot create a transistor by connecting two diodes together. There is an interaction between the junctions of a transistor, said interaction being not possible when two diodes are connected together.


Can you make a transistor by connecting two diodes back to back?

Two diodes, whether or not discreet, cannot work together as a transistor. The diodes and transistor have different profiles to optimize them for their specific functions


Is transistor a rectifier?

there are two diodes there but to use them as rectifiers never


Why do you need to structure transistor as diode?

A transistor is not a diode. It is also not a pair of back to back diodes. Two diodes connected back to back will not function like a transistor because their junctions are not in close proximity like they are in a transistor. The only reason for "thinking" that a transistor is "like" a pair of back to back diodes is for purposes of quick go-nogo testing with a multimeter, but that will only assess open, short, and leakage status, as well as polarity, but not any of the more useful things, such as hFe.


Why different transistor have different resistance?

Because they are different transistors. Resistance among their internal diodes is one of the main features of a transistor.


How does common emitter transistor show more temperature variation than common base transistors?

A transistor is made up of two diodes back-to-back. In a common base circuit - the load is shared between two diodes


How many diodes in a transistor?

There are two semiconductor junctions. Transistors are designated as NPN or PNP and a diode is an NP or PN junction depending on direction of current flow. However, the function of a transistor is different than two back to back diodes.


How transistor work as a diode?

A: Actually a transistor have two diode with the base mas a common terminal. the characteristics of these tow diodes however are not the same as a common diode