Question: What Can A Transistor Be Used For?

How are transistors classified?

Transistors are basically classified into two types; they are Bipolar Junction Transistors (BJT) and Field Effect Transistors (FET).

The BJTs are again classified into NPN and PNP transistors..

How do you identify a transistor?

Pin Identification of Transistors In plastic casing, one side of the transistor is Flat which is the front side and the pins are arranged serially. To identify the pins, keep the front flat side facing you and count the pins as one, two etc. In most NPN transistors it will be 1 (Collector), 2 (Base) and 3 ( Emitter ).

Under what condition does the transistor act as an amplifier?

The transistor behaves as an amplifier when the input circuit (emitter – base) is forward biased having low voltage VBB and the output circuit (collector – base) is reverse biased having high voltage VCC.

What devices use transistors?

By far the most common application of transistors today is for computer memory chips—including solid-state multimedia storage devices for electronic games, cameras, and MP3 players—and microprocessors, where millions of components are embedded in a single integrated circuit.

Can a transistor be used as an amplifier?

A transistor acts as an amplifier by raising the strength of a weak signal. The DC bias voltage applied to the emitter base junction, makes it remain in forward biased condition. … Thus a small input voltage results in a large output voltage, which shows that the transistor works as an amplifier.

Can transistor be used as rectifier?

A transistor can be used as a rectifier. When you connect base-emitter or base-collector region and use it as a diode, a transistor can work as a low current rectifier.

Which transistor is used as amplifier?

Thetransistor configurationsare classified into three types such as CB (common base), CC (common collector), and CE (common emitter). But common emitter configuration is frequently used in the applications like an audio amplifier.

What is transistor in simple words?

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit.

How do you use a transistor?

One of the most common uses for transistors in an electronic circuit is as simple switches. In short, a transistor conducts current across the collector-emitter path only when a voltage is applied to the base. When no base voltage is present, the switch is off. When base voltage is present, the switch is on.

What is an example of a transistor?

The definition of a transistor is an electronic device that works by controlling the flow of the electrical current. An example of a transistor is something combined in large numbers with microcircuits into a single circuit board and used in a computer.

Which transistor is best for audio amplifier?

Best Transistors: BJTs#1 NPN – 2N3904. You can find most often NPN Transistors in low-side switch circuits. … #2 PNP – 2N3906. For high-side switch circuits, you need a PNP style BJT. … #3 Power – TIP120. … #4 N-Channel (Logic Level) – FQP30N06L.

What is transistor diagram?

Transistor currents The diagram shows the two current paths through a transistor. The small base current controls the larger collector current. When the switch is closed a small current flows into the base (B) of the transistor.

Can transistor be used as diode?

Since a bipolar transistor is essentially two diodes, it can function as such. 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. … Use dedicated diodes for typical diode applications instead of bipolar transistors.

Can transistor amplify DC?

Yes,by using direct coupling(transistors) amplifier we will amplify low frequency (DC) signals. … A transistor is certainly capable of taking a small-current input signal and controlling a high-current output at the same voltage, thereby amplifying the power of the input signal whether it’s AC or DC.

What is difference between transistor and amplifier?

In this sense, an amplifier modulates the output of the power supply to make the output signal stronger than the input signal. A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power.

What is the difference between a PNP and NPN transistor?

An NPN transistor has a piece of P-type silicon (the base) sandwiched between two pieces of N-type (the collector and emitter). In a PNP transistor, the type of the layers are reversed. Below is a typical cross section of a transistor. NPN and PNP transistors have very similar schematic symbols.

What are the two main types of transistors?

Types of transistorThere are two types of standard (bipolar junction) transistors, NPN and PNP, with different circuit symbols as shown. … The leads are labelled base (B), collector (C) and emitter (E). … In addition to bipolar junction transistors, there are field-effect transistors which are usually referred to as FETs.More items…

Why transistor is not used as rectifier?

Since base is thin one and lightly doped, either of the two segment does not work properly as p-n junction diode, which is required for a rectifier. … That is why, a transistor can not be used as a rectifier.

What is the difference between diode and transistor?

Put simply, a diode is a two-terminal semiconductor device and a transistor is a three-terminal semiconductor device. A diode can allow the flow of current in one direction while blocking the flow of current in the other direction.

How are transistors rated?

Power dissipation At any given time, the power dissipated by a transistor is equal to the product of collector current and collector-emitter voltage. Just like resistors, transistors are rated for how many watts each can safely dissipate without sustaining damage.