WorksheetsVLSI - Mock Test
Total questions: 20
Worksheet time: 18mins
In a MOS transistor, channel width has increased by 2 times. Corresponding change in the resistivity is,
4 Times increase
Doubled
Reduced by half
None of these
The following program is executed in an 8085 processor,
MVI A,0A H;
MVI B,04 H;
LOOP: ADD B;
DCR B;
JNZ LOOP;
HLT;
At the end of the program, accumulator contains
00 H
04 H
1A H
14 H
A D flip-flop is connected as shown in the figure. The input clock frequency is 100 MHz. What is the possible output frequency?
100 MHz
150 MHz
200 MHz
50 MHz
For a TTL circuit, following data are given. VIH(min) = 2 V, VIL(max) = 0.8 V, VOH(min) = 2.5 V and VOL(max) = 0.4 V. The HIGH level and LOW level noise margins are, respectively
0.5 V and 0.4 V
0.4 V and 0.5 V
2.4 V and 2 V
None of these
The output F of the shown 4 to 1 Multiplexer is
XY
X+Y
X+Y
XY
In a standard TTL, ‘totem pole’ stage refers to
Phase Splitter
Open Collector Output Stage
Multi - Emitter Input Stage
Output Buffer
The NMOS circuit chain shown in the figure can act as a
Buffer
NAND Gate
NOR Gate
Invertor
In a CARRY LOOK AHAEAD ADDER, carry generate (G)and carry propagate functions (P) can be realized by using
OR and AND gates respectively
AND and XOR gates respectively
NAND and NOR gates respectively
XOR and XNOR gates respectively
Zener breakdown diodes have breakdown voltage which
has positive temperature coefficient
is independent of temperature
has negative temperature coefficient
None of these
In a bipolar transistor biased in the forward active region, has base current IB= 50 μA and collector current IC= 2.7 mA. Then α is,
0.949
1
0.982
50
In a common emitter amplifier, the un-bypassed emitter resistance provides
Current Series Feedback
Voltage Series Feedback
Voltage Shunt Feedback
Current Shunt Feedback
Two breakdown diodes A and B have breakdown voltage ratings of 5.6 V and 24 V, respectively. Then
A is a Zener diode and B is an avalanche diode
B is a Zener diode and A is an avalanche diode
Both are Zener diodes
Both are avalanche diodes
Commonly used material in photoconductive cells which is to work in visible spectrum is,
Ge
Si
CdS
GaAs
What is the total number of transistors required in a static N- input pseudo NMOS logic gate?
N
2N
N+1
N-1
For the op-amp circuit shown, the feedback resitance is 2 K ohm and all other resistances are of 1 K ohm. The output voltage is
-2 V
-1 V
-0.5 V
0.5 V
The fastest logic family is
CMOS
NMOS
TTL
ECL
Supply voltage of a CMOS circuit is doubled. Its dynamic power dissipation will
not change
be doubled
be halved
increase by 4 times
While transforming the given circuit to an equivalent voltage source and a series resistor, the values of source voltage and resistance will be,
10 V, 100 Ω
75.5 V, 75 Ω
12.55 V, 100 kΩ
88.42 V, 7.92 kΩ
Which of the following one is not a bilateral element?
Resistor
LED
Capacitor
LDR
The technology node we used while designing an inverter layout during training is
90 nm
22 nm
180 nm
45 nm
