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What determines the power dissipated in the transistors?
Power dissipation When a transistor conducts current between collector and emitter, it also drops voltage between those two points. At any given time, the power dissipated by a transistor is equal to the product of collector current and collector-emitter voltage.
How do you select an equivalent transistor?
Choose a transistor with a similar power dissipation : It is necessary to ensure that the replacement transistor can handle the power that it will dissipate within the circuit. Choosing a replacement transistor with a similar can style will often mean that both transistors have a similar power dissipation.
What is the difference between Fets and BJTS?
The major difference between BJT and FET is that in a field-effect transistor only majority charge carries flows, whereas in BJT both majority and minority charge carriers flow.
What should be considered when choosing a transistor replacement?
When looking for a suitable transistor replacement some of the basic transistor parameters that need to be considered include the following: Semiconductor material used: Most transistors will either be germanium or silicon. Other types are normally only used in very specialist applications.
Which is an example of an application for a transistor?
Possible application types may include: switching, analogue, low power, RF amplifier, low noise, etc. Put in the correct type and it may not perform well. For example a low power general-purpose transistor is unlikely to work well in a switching application even if it has a high ft or frequency limit.
What are the three types of power dissipation?
1 Static power dissipation (due to leakage current when the circuit is idle) 2 Dynamic power dissipation (when the circuit is switching) 3 Short-circuit power dissipation during switching of transistors
Are there any other devices similar to a transistor?
Alternatively, sometimes small voltage regulators are contained in packages similar to that of a transistor. Other devices may also appear in what may appear to be transistor packages at first sight. Careful examination of the application will enable this to be verified.