Analog Electronics
Which is the Invalid state of the BCD code ?
a.1001
b.1101
c.0100
b.1101
An example of a discrete set of information/system is
a) the trajectory of the Sun
b) data on a CD
c) universe time scale
d) movement of water through a pipe
b.Data on CD
The number of bits conveyed or processed for unit time is called ________
a.Baud rate
b.Bit rate
c.ISI
b.Bit rate
Which is a software interrupt?
a) TRAP
b) INTR
c) RST-5
c) RST-5
The most commonly used amplifier in sample and hold circuit is ……………
a. unity gain non-inverting amplifier
b. unity gain inverting amplifier
c. inverting amplifier with a gain of 10
b. unity gain inverting amplifier
The digital equivalent of an electronic series circuit is ?
1.OR gate
2.AND gate
3.XOR gate
b.AND
All causal systems must have the component of
a) memory
b) time invariance
c) stability
d) linearity
a. Memory
The industrial noise occurs in the range around ?
a.300MHz-600MHz
b.1MHz-600MHz
c.200MHz-600MHz
b.1MHz-600MHz
What is the vectored address of RST-5?
a) 0010 H
b) 0032 H
c) 0028 H
c) 0028 H
MOSFET can be used as a …………
a.Current controlled capacitor
b.Volatge controlled capacitor
c.Current controlled inductor
B.Volatge controlled capacitor
A decade counter requires ?
a.5 Flipflops
b.4.Flipflops
c.10Flipflops
b.4.Flipflops
Which of the following is the process of ‘aliasing’?
a) Peaks overlapping
b) Phase overlapping
c) Amplitude overlapping
d) Spectral overlapping
d) Spectral overlapping
In baseband signal the audio frequency signal range is around ________
a.0-20 KHz
b.5-10 KHz
c.0-20 MHz
a.0-20 KHz
How many address lines are required to connect a 4 KB RAM to a microprocessor?
a) 10
b) 16
c) 12
d) 20
c) 12
The load impedance ZL of a CE amplifier has R and L in series. The phase difference between output and input will be ………….
a.180°
b.more than 90° but less than 180°
c.more than 180° but less than 270°
c.more than 180° but less than 270°
The gates required to convert a NOR-based SR latch to an SR flip-flop?
a) Two 2 input AND gates
b) Two 3 input AND gates
c) Two 2 input OR gates
a. Two 2 input AND gates
The spectral density of white noise is ____________
a) Exponential
b) Uniform
c) Poisson
d) Gaussian
b) Uniform
DAA instruction is used to perform which type of addition?
a) BCD addition
b) Excess-3 addition
c) Binary addition
d) Octal addition
a) BCD addition
Which oscillators is suitable for frequencies in the range of mega hertz?
a.RC phase shift
b.Wien bridge
c.Hartley
c.Hartley
Which operation occurs in a J – K flip flop when both inputs J and K are equal to 1?
a) Preset operation
b) Reset operation
c) Clear operation
d) Toggle operation
d. Toggle operation
For a stable system which of the following is correct?
a) |z| < 1
b) |z| = 1
c) |z| > 1
d) |z| ≠ 1
a) |z| < 1
How much is the frequency band in GSM?
a.500 MHz
b.600 MHz
c.700 MHz
d. 900 MHz
d.900 MHz
Which of the following interfacing IC is a DMA controller?
a) 8257/37
b) 8155
c) 8253/54
d) 8279
a) 8257/37