GATE 2007 ECE Video Solutions on Analog Circuits (Analog Electronics)

1. In a Transconductance amplifier, it is desirable to have
a. A large input resistance and a large output resistance
b. A large input resistance and a small output resistance
c. A small input resistance and a large output resistance
d. A small input resistance and a small output resistance

Answer:A

Solution: https://www.youtube.com/watch?v=XdHNm2Ly-Kc


2. For the OP-AMP circuit shown in the figure, V_o is

a. – 2 volts
b. – 1 volts
c. – 0.5 volts
d. + 0.5 volts

Answer:C

Solution: https://www.youtube.com/watch?v=GNXEesKW7VQ


3. In the OP-AMP circuit shown, assume that the diode current follows the equation I = I_Sexp(V/V_T). For V_i = 2 Volts, V_o = V₀₁, and for V_i = 4 Volts, V_o = V₀₂. The relationship between V₀₁ and V₀₂ is

a. V₀₂ = √2 V₀₁
b. V₀₂ = e² V₀₁
c. V₀₂ = V₀₁ ln2
d. V₀₂ - V₀₁ = V_T ln2

Answer: D

Solution: https://www.youtube.com/watch?v=_FEUmzL53hg


Statement for Linked Answer Questions
Consider the OP-AMP circuit shown in the figure.

4. The Transfer function V_o(s)/ V_i(s) is

Answer:A

5. If V_i = V₁ sin(ωt) and V_o = V₂ sin(ωt+ø), then the minimum and maximum values of ø (in radians) are respectively
a. – π/2 and π/2
b. 0 and π/2
c. – π and 0
d. – π/2 and 0

Answer: C

Solution(4 & 5): https://www.youtube.com/watch?v=5BVus7UsCas