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how to make a transistor "beta independent"

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elec-eng

elec-eng

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please i want to know how to design an amplifier that is independent of beta"hfe"

as in datasheet beta has no certain value for a certain IC & VCE
but it has a minimum and maximum value

also it varies with Ic and temperature




thanx

Added after 11 minutes:

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most of the opamp is used in the feedback loop, so the final gain is independent of temperature and process,

if you can use close feedback loop to set your opamp's
gain ,then it will achieve you goal.

do not care about the specific paratmeter
 

Negative reaction is decreasing the gain and keep it stable.
hfe is dependent by the Ic, there isn't any other option.
 

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