If the current gain of the transistor is β, what is the stability factor pertaining to IC and ICO?(a) β+1/{1 + β * R1/(R1 + β)}(b) β+1(c) β+1/{1 + β * R2/(R1 + β)}(d) β+1/{1 + (R1 + β)}I got this question in homework.Enquiry is from Collector Feedback Configuration in division Transistor Biasing and Low Frequencies of Analog Circuits

If the current gain of the transistor is β, what is the stability fac

1.	If the current gain of the transistor is β, what is the stability factor pertaining to IC and ICO?(a) β+1/{1 + β * R1/(R1 + β)}(b) β+1(c) β+1/{1 + β * R2/(R1 + β)}(d) β+1/{1 + (R1 + β)}I got this question in homework.Enquiry is from Collector Feedback Configuration in division Transistor Biasing and Low Frequencies of Analog Circuits
Answer» Right option is (a) β+1/{1 + β * R1/(R1 + β)} Easy explanation: The stability factor is determined by calculating the change in IC with respect to the change in ICO. Hence, we can SIMPLY apply the method of K.V.L. and derive a RELATION between these two currents. After DIFFERENTIATION, we’ll get the stability factor as β+1/{1 + β * R1/(R1 + β)}.

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