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4 of 24 articles

BJT Current Relationships

Alpha, beta, relationship between IC IB IE, current gain.

Darshan N
Updated: 27 March 2026
7 min read
#BJT

BJT Current Relationships Quiz

Test your command of alpha, beta, and the relationships between IC, IB, and IE in BJT operation.

Question 1 of 3

Q1.A BJT has a common-emitter current gain beta = 120. What is its common-base current gain alpha?

Related Articles

BJT Frequency Response

Miller effect, bandwidth, upper and lower cutoff frequencies.

6 min read

BJT Bias Stability

Stability factors S(ICO) S(VBE) S(beta), thermal runaway.

6 min read

BJT Structure and Construction

NPN and PNP layers, emitter-base-collector doping profiles.

5 min read

BJT Small Signal Model

Hybrid pi model, transconductance gm, input resistance rpi.

8 min read

BJT Input Output Characteristics

IC vs VCE, IB vs VBE curves, Early effect.

7 min read

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BJT PNP Operation
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BJT Operating Regions