GATE ECE 2001 | GATE ECE Year Wise Previous Years Questions

GATE ECE 2001

Subjective

-0

Assume that the OP_AMP in the figure, ideal GATE ECE 2001 Analog Circuits - Operational Amplifier Question 4 English

(a) Obtain an expression for V₀ in terms of V_s, R, and the reverse saturation current I_s of the transiostor.

(b) If R = 1$$\Omega $$, I_s = 1pA and the thermal voltage V_T = 25mV, then what is the value of the output voltage V₀ for an input voltage V_s = 1V?

(c) Suppose that the transistor in the feedback path is replaced by a p-n junction diode with a reverse saturation current of I_s. The p-side of the diode is connected to node A and the n-side to node B. Then what is the expression for V₀ in terms V_s, R and I_s ?

GATE ECE 2001

MCQ (Single Correct Answer)

-0.3

A band limited signal is sampled at the Nyquist rate. The signal can be recovered by passing the samples through

an RC filter

an envelope detector

a PLL

an ideal low-pass filter with the appropriate bandwidth

GATE ECE 2001

MCQ (Single Correct Answer)

-0.6

During transmission over a communication channel, bit errors occur independently with probability 'p'. If a block of n bits is transmitted, the probability of at most one bit error is equal to

$$1 - {\left( {1 - p} \right)^n}$$

$$p + \left( {n - 1} \right)\left( {1 - p} \right)$$

$$np - {\left( {1 - p} \right)^{n - 1}}$$

$${\left( {1 - p} \right)^n} + np{\left( {1 - p} \right)^{n - 1}}$$

GATE ECE 2001

MCQ (Single Correct Answer)

-0.6

A video transmission system transmits 625 picture frames per second. Each frame consists of a $$400\,\, \times \,\,400$$ pixel grid with 64 intensity levels per pixel. The data rate of the system is

16 Mbps

100 Mbps

600 Mbps

6.4 Gbps

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