How to provide saturation current and temperature compensation in log-amp?
A. Applying reference voltage alone to two different log-amps
B. Applying input and reference voltage to same log-amps
C. Applying input and reference voltage to separate log-amps
D. None of the mentioned
Answer:A
How to provide saturation current and temperature compensation in log-amp?
A. Applying reference voltage alone to two different log-amps B. Applying input and reference voltage to same log-amps C. Applying input and reference voltage to separate log-amps D. None of the mentioned
Explanation: The emitter saturation current varies from transistor to transistor with temperature. Therefore, the input and reference voltage are applied to separate log-amps and two transistors are integrated close together in the same silicon wafer. This provides a close match of the saturation currents and ensures good thermal tracking. 5. The input voltage, 6v and reference voltage, 4 v are applied to a log-amp with saturation current and temperature compensation. Find the output voltage of the log-amp?