Discussion
What does it mean for a bias design to be beta-independent?
Answer: B
Beta independence means the expression for the operating point contains only voltages and resistances, so any device in the family gives the same result. Measuring and allowing for beta, or selecting devices, are both ways of coping with dependence rather than removing it, and a low stability factor is a related consequence. A design property that survives changing the device is worth far more than one that has been tuned around a particular sample.
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