Calculate the base voltage of Q2 transistor in the log-amp using two op-amps?
A. 8.7v
B. 5.3v
C. 3.3v
D. 6.2v
Answer:A
Calculate the base voltage of Q2 transistor in the log-amp using two op-amps?
A. 8.7v B. 5.3v C. 3.3v D. 6.2v
Explanation: The base voltage of Q2 transistor, VB = [RTC / (R2 +RTC)]×(Vi) = [10kΩ/(5kΩ+10kΩ)]×5v =3.33v. 9. Compute the reference voltage for a fundamental log-amp, if it’s internal resistance=5MΩ.