GATE EE: 2018 Mini Mock 5 for ESE & GATE EE Exams

Question 1

Consider the Schmidt trigger circuit shown below.

A triangular wave which goes from -12V to 12V is applied to the inverting input of the OPAMP. Assume that the output of the OPAMP sings from +15V to -15V. The voltage at the non-inverting input switches between

Question 2

The magnitude and phase response of a system are shown below

The transfer function H(Z) of the system is (where

)

Question 3

What are the contents of Q₁ & Q₀ after 78^th clock pulse. Initially the contents are Q₁= 0, Q₀ = 0

Question 4

The 8- bit left shift register and D- flip flop shown in figure is synchronized with same clock. The d flip flop initially cleared.

The circuit act as

Question 5

when a plane wave is incident normally from dielectric ‘1’(

onto ‘2’(

electric field of the transmitted wave is -2 times the electric field of the reflected wave
The ratio

is

Question 6

In the circuit shown, I₁ = 80 mA and I₂ = 4 mA. Transistors T₁ and T₂ are identical. Assume that the thermal voltage V_T is 26 mV at 27 °C. At 50 °C, the value of the voltage V₁₂ = V₁ – V₂ (in mV) is _______.
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Question 7

The characteristic equation of a unity negative feedback system 1 + KG(s) = 0. The open loop transfer function G(s) has one pole at 0 and two poles at -1. The root locus of the system for varying K is shown in the figure.

The constant damping ratio line, for

intersects the root locus at point A. The distance from the origin to point A is given as 0.5. The value of K at point A is ________ .

Question 8

Consider the program given below for INTEL 8085
MVI C, 0B H
LXI H, 2400 H
LXI D, 3400 H
LOOP MOV A, M
STAX D
INR L
INR E
DCR C
JNZ LOOP
HLT
The total number of memory accesses required are _______.

Question 9

In the following figure, the transmitter Tx sends a wideband modulated RF signal via a coaxial cable to the receiver Rx. The output impedance