Applications of Transistors with Different β values

AI Thread Summary
Transistors with different β values serve distinct applications based on their characteristics. High β transistors are often utilized as switches due to their ability to control collector current with minimal base current. Middle β transistors may balance performance and efficiency for various amplification tasks. Low β transistors are typically optimized for specific parameters like high collector current or breakdown voltage, often sacrificing β for other performance metrics. Understanding these applications can aid in selecting the appropriate transistor for specific electronic designs.
challarao
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Hi, I'm a newbie...
I came to know that there are many types of transistors available in the market with high, middle, and low β values.But, I don't have any idea about applications of each in detail.Can anybody tell me the applications of high β, middle β, and low β valued CE transistors respectively.I think high β valued transistors are used as switches.Am I correct?.
Any help or web link would be highly appreciated...
I tried searching in Google but couldn't find...
Thanks in advance...
 
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Usually variation in B is due to optimizing some other variable. For example maybe you want to make a transistor that can carry a lot of collector current relative to other transistors, a very low temp co, or have a really high Vce breakdown voltage, etc.. These optimizations usually come with reduced B.

One can also sacrifice on the other variables of a transistor to maximize B. This is often done with low power (Ic<100mA) switches. Because of the high B one can manipulate Ic with very small amounts of power in Ib which is useful for switches.
 

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