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- either field effect (JFET, MOSFET) or junction (BJT) or point contact (usually considered obsolete)
- either small signal or high power
- either electron majority carrier (N-channel FET, NPN BJT) or hole majority carrier (P-channel FET, PNP BJT)
- either linear (used in amplifier and oscillator circuits) or switching (used in digital logic circuits)
- etc.
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∙ 6y ago
Wiki User
∙ 9y agoPNP or NPN
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How many pn junction does transistor contain?
Two, either in NPN or PNP transistors
What are PNP and NPN?
In most discrete bipolar junction transistors the substrate is the collector. In monolithic integrated circuits the bipolar junction transistors are electrically isolated from the substrate, either by reversed biased junctions or insulator (e.g. sapphire). Some older bipolar junction transistor types (usually made with germanium) the substrate is the base. In bipolar point contact transistors the substrate was the base.
Why are npn transistors used more often than pnp transistors?
The primary reason that NPN transistors are used more often than PNP transistors is that they usually operate faster (at higher frequencies) because the mobility of the current carriers in NPN transistors (electrons) is much higher than that of the current carriers in PNP transistors (holes).
Where can I find output transistors to repair and amplifier?
You need to know the specifications for the transistors and search for them on the internet.
Why do transistors sometimes need heatsinks?
These types of transistors are power transistors and generate heat. The heat sink is used to dissipate the heat. If the transistor gets too hot it will fail.
When transistors are used as switches what are the two conditions in which they operate?
on or off
How do transistors represent binary?
By driving them to saturation - so that they're either on or off.
How many pn junction does transistor contain?
Two, either in NPN or PNP transistors
Why are MOSFETs used in motor control circuits instead of bipolar junction transistors?
Actually either can be used.
What are power transistors?
Power transistors are transistors that are used in high-power amplifiers and power supplies.
What are transistors used for?
Transistors have two basic functions: # an electrically controlled electric switch # an electrically controlled "proportional valve" which can alter currents and voltages, or can amplify electric signals. Transistors can also be configured as Oscillators which provide an AC signal with constant frequency. Either an amplifier circuit or a switching circuit can be wired as an oscillator. Transistors can be used to form logic gates: And, Or, and Invert. Computers are made from logic gates, so computers can be made entirely from transistors. Transistors are in use in virtually all electronic devices. PC processors are composed of millions of tiny transistors. A transistor radio may have had only 6-10 transistors to enable operation. A late model car may have 10 to 15 computers comprised of thousands of transistors to perform all manner of operations in the vehicle.
Are transistors semiconductors?
Transistors are made out of semiconductors, yes.
What are PNP and NPN?
In most discrete bipolar junction transistors the substrate is the collector. In monolithic integrated circuits the bipolar junction transistors are electrically isolated from the substrate, either by reversed biased junctions or insulator (e.g. sapphire). Some older bipolar junction transistor types (usually made with germanium) the substrate is the base. In bipolar point contact transistors the substrate was the base.
What element are in transistors?
Silicon and germanium are the elements used in transistors
What elements in in transistors?
Silicon and germanium are the elements used in transistors
Why are npn transistors used more often than pnp transistors?
The primary reason that NPN transistors are used more often than PNP transistors is that they usually operate faster (at higher frequencies) because the mobility of the current carriers in NPN transistors (electrons) is much higher than that of the current carriers in PNP transistors (holes).
What elements are used in transistors?
Silicon and germanium are the elements used in transistors
