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Electronics and Communication Engineering Analog Electronics Experiments

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Theory

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Simulation

Posttest

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Log and Antilog amplifiers.

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Beginner

Intermediate

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The input voltage, 6V and reference voltage, 4V are applied to a log-amp with saturation current and temperature compensation. Find the output voltage of the log-amp?

a: 6.314(kT/q)V Explanation

Explanation

b: 0.597(kT/q)V Explanation

Explanation

c: 0.405(kT/q)V Explanation

Explanation

d: 1.214(kT/q)V Explanation

Explanation

Find the output voltage of the antilog-amplifier.

a: V₀ = -R_f I_s e(V_i/ɳVT) Explanation

Explanation

b: V₀ = -R₁ I_s e(V_i/ɳVT) Explanation

Explanation

c: V₀ = -R_f I_f e(V_i/ɳVT) Explanation

Explanation

d: V₀ = -R_f I_s e(V_f/ɳVT) Explanation

Explanation

Find the output voltage of the log-amplifier.

a: V₀ = -(kT)×ln(V_i/V_ref) Explanation

Explanation

b: V₀ = -(kT/q)×ln(V_i/V_ref) Explanation

Explanation

c: V₀ = -(kT/q)×ln(V_ref/V_i) Explanation

Explanation

d: V₀ = (kT/q)×ln(V_i/V_ref) Explanation

Explanation

An antilog amplifier has ___________ in series with input.

a: Inductor Explanation

Explanation

b: Capacitor Explanation

Explanation

c: Resistor Explanation

Explanation

d: Either diode or BJT Explanation

Explanation

Determine the output voltage for the circuit of Figure 1 if Vin=1V, Ri=50kΩ, and Is=30nA. Assume T=300T=300 Kelvin.

a: V_out=−0.1684V Explanation

Explanation

b: V_out=−0.2584V Explanation

Explanation

c: V_out=−1.1684V Explanation

Explanation

d: V_out=−2.1684V Explanation

Explanation

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