What happens when base and collector shorted?

What happens when base and collector shorted?

In a BiPolar Junction transistor, the emitter is forward biased and the collector is reverse biased with respect to the base. Now, if an emitter and a collector are shorted, that would make both of them either forward biased or reverse biased depending on the bias voltage.

Can you use BJT as a diode in the circuit explain how?

However, since bipolar transistors are not designed to be used as diodes, using them as diodes might cause a problem in terms of current and other ratings. For example, transistors are generally used with a base current that is less than one-tenth the required collector current.

Why are diodes shorted?

Issue: A Shorted Diode The common reasons for a diode failure are excessive forward current and a large reverse voltage. Usually, large reverse voltage leads to a shorted diode while overcurrent makes it fail open.

What is the role of the collector base reverse bias junction in the BJT transistor?

Bipolar transistors have four distinct regions of operation, defined by BJT junction biases. The base–emitter junction is forward biased and the base–collector junction is reverse biased. By reversing the biasing conditions of the forward-active region, a bipolar transistor goes into reverse-active mode.

What happens when you short a transistor?

Nothing will happen to the transistor when you shorten C with E, but components around it may be damaged due to unlimited currents (short means 0 ohm) .. However, when you release the short and damage has occurred to a component (or components) connected to it, there is a good chance that it also will be damaged ..

What happens when you short a diode?

When a diode is shorted, the voltage drop reading in both the directions will be the same.

Can a diode short to ground?

Yes, it is shorted or open. It may fail either way. In many cases, I’ve found that small signal diodes tend to fail open, and power diodes tend to fail short.

Why is the base collector junction forward biased?

Forward bias on the emitter to base junction causes the electrons to flow from N type emitter towards the bias. This condition formulates the emitter current (IE). Rest of the electrons cross the thin depletion region and reach the collector region. This current constitutes collector current (IC).

Is collector base junction reverse biased?

Consider an n-p-n transistor, In base emitter transistors the current is flowing forward biased, whereas, in collector and emitter transistors the current is passing in reverse biased. Thus, the emitter-base junction is forward biased and collector-base junction is reverse biased.

Does BJT work like a diode?

Is it work like normal BJT where there is Ic and Ib current? Or, It just work like a diode as there is only one biasing voltage difference between one pn junction and zero voltage difference ( so no foreword or rivers bias ) for other junction? Thanks for contributing an answer to Electrical Engineering Stack Exchange!

Why do ICIC transistors short circuit the collector base?

ICs use transistors connected as a diode this way for low-voltage voltage references. They are better than an ordinary diode because their forward voltage is lower and doesn’t rise as much with increased current. Short circuiting the collector-base ensures that the collector-base junction is always reverse biased.

What is the purpose of short circuiting the collector-base junction?

Short circuiting the collector-base ensures that the collector-base junction is always reverse biased. For a NPN, where P is base, N+ is emitter, connect P and N+ accordingly to be used as a simple PN-junction diode.

Is it correct to say a transistor is shorted or diode connected?

Like Arnub already mentioned, saying ‘shorted’ will be more appropriate. Yes, when you short base and collector of a transistor they act like diodes and its called a diode connected configuration, these are used as loads (active) in some amplifiers.