- Which transistor is used as amplifier?
- Are transistors interchangeable?
- How do I know which transistor to use?
- Can I use any transistor for amplifier?
- Can IGBT replace Mosfet?
- What is PNP and NPN?
- What is transistor diagram?
- What’s the difference between NPN and PNP transistors?
- What are the 2 types of transistors?
- Is a transistor an AND gate?
- Which amplifier has highest gain?
- Which is better PNP or NPN?
- Are all transistor the same?
- What can we use instead of transistor?
- What is difference between mosfet and transistor?
- How transistor is used as current amplifier?
- When PNP transistor is used as an amplifier?
- Can I use PNP instead of NPN?
- Can I replace mosfet with transistor?
- Which transistor is best for switching?
- How are transistors made so small?
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..
Are transistors interchangeable?
Answer: NPN and PNP transistors are interchangeable if you remember one simple rule: A bipolar transistor is essentially two back-to-back diodes with the base being the common connection. For a transistor to work, one diode is forward biased and the other is reverse biased.
How do I know which transistor to use?
Transistor data is available from most suppliers, for example see Rapid Electronics.Choose the right type of transistor, NPN or PNP. … Find out the supply voltage(s) and load properties. … Work out the transistor properties required. … Work out a value for the base resistor R. … Check if you need a protection diode.
Can I use any transistor for 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 IGBT replace Mosfet?
Due to the higher usable current density of IGBTs, it can usually handle two to three times more current than a typical MOSFET it replaces. This means that a single IGBT device can replace multiple MOSFETs in parallel operation or any of the super-large single power MOSFETs that are available today.
What is PNP and NPN?
In an NPN transistor, a positive voltage is given to the collector terminal to produce a current flow from the collector to the emitter. In a PNP transistor, a positive voltage is given to the emitter terminal to produce current flow from the emitter to collector.
What is transistor diagram?
Diagram ‘A’ shows an NPN transistor which is often used as a type of switch. A small current or voltage at the base allows a larger voltage to flow through the other two leads (from the collector to the emitter). The circuit shown in diagram B is based on an NPN transistor.
What’s the difference between NPN and PNP transistors?
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. … NPN and PNP transistors have very similar schematic symbols. The only difference is the direction of the arrow on the emitter.
What are the 2 types of transistors?
Basic Electronics – Types of TransistorsThe primary transistor is the BJT and FET is the modern version of transistor. Let us have a look at the BJTs. … The types of BJT are NPN and PNP transistors. … The FET is a unipolar device, which means that it is made using either p-type or n-type material as main substrate. … Source.
Is a transistor an AND gate?
A bipolar transistor has terminals labeled base, collector, and emitter. … For a field-effect transistor, the terminals are labeled gate, source, and drain, and a voltage at the gate can control a current between source and drain. The image represents a typical bipolar transistor in a circuit.
Which amplifier has highest gain?
the power gain is highest in Common emitter: This transistor configuration is probably the most widely used. The circuit provides a medium input and output impedance levels. Both current and voltage gain can be described as medium, but the output is the inverse of the input, i.e. 180° phase change.
Which is better PNP or NPN?
A NPN transistor has electrons as majority charge carriers whereas the PNP transistor has holes as majority charge carrier. The mobility of electrons is better than mobility of holes. … mobility of electrons is more than hole,so as a result npn transistor are faster than pnp that’s why they are preferred..
Are all transistor the same?
Select a replacement transistor of the same material: Most transistors are either silicon or germanium. As bias voltages and other features are different it is necessary to select a replacement transistor with the same material.
What can we use instead of transistor?
The most obvious alternatives to transistors are vacuum tubes and electromechanical relays. In addition, magnetic amplifiers (magamps) are useful. Piezoelectric relays are rare. Rotating amplifiers, such as amplidyne motor-generator machines are useful at higher power levels.
What is difference between mosfet and transistor?
The Bipolar Junction Transistor (BJT) is a current-driven device (in contrast, MOSFET is voltage-driven) that is widely used as an amplifier, oscillator, or switch, amongst other things.
How transistor is used as current amplifier?
Transistor amplifying current The small current travels from the voltage source into the base of the transistor. A current at the base turns on the transistor. The current is then amplified and travels from the emitter of the transistor to the collector.
When PNP transistor is used as an amplifier?
Solution : When NPN transistor is used as an amplifier, majority charge carriers electrons of N-type emitter move from emitter to base and than base to collector. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.
Can I use PNP instead of NPN?
Generally, the PNP transistor can replace NPN transistors in most electronic circuits, the only difference is the polarities of the voltages, and the directions of the current flow. PNP transistors can also be used as switching devices and an example of a PNP transistor switch is shown below.
Can I replace mosfet with transistor?
Remove the base resistor from the circuit because we don’t typically need it anymore with a MOSFET. Connect the gate of the N-MOSFET directly to the activation voltage source. Keep the positive supply connected to one of the load terminals, and connect the other terminal of the load to the drain of the MOSFET.
Which transistor is best for switching?
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.Apr 21, 2014
How are transistors made so small?
They’re made of silicon, the second-most abundant material on our planet. Silicon’s atomic size is about 0.2 nanometers. Today’s transistors are about 70 silicon atoms wide, so the possibility of making them even smaller is itself shrinking.