Assuming VCesat=0.2V and β = 50, the minimum base current (IB) required to drive the transistor in the figure to saturat

The circuit in the figure is a

In the op-amp circuit given in the figure, the load current iL is

Voltage series feedback (also called series-shunt feedback) results in

An ideal Op-Amp is an ideal

The value of 'C' required for a sinusoidal oscillation of frequency 1 KHz in the circuit of the figure is

A bipolar transistor is operating in the active region with a collector current of 1mA. Assuming that the 'β' of the tra

In the output of a DM speech encoder, the consecutive pulses are of opposite polarity during time interval t1 $$ \le $$

In a PCM system, if the code word length is increased from 6 to 8 bits, the signal to quantization noise ratio improves

Consider a binary digital communication system with equally likely $$0’s$$ and $$1’s$$. When binary $$0$$ is transmitted

Choose the correct one from among the alternatives A, B, C, D after matching an item from Group 1 with the most appropri

A source produces binary data at the rate of 10 kbps. The binary symbols are represented as shown in fig. The source

Three analog signals, having bandwidths 1200 Hz, 600 Hz and 600 Hz are sampled at their respective Nyquist rates, enocod

A 1 mW video signal having a bandwidth of 100 MHz is transmitted to a receiver through a cable that has 40 dB loss. If t

Two sinusoidal signals of same amplitude and frequencies 10 kHz and 10.1 kHz are added together. The combined signal is

An AM signal and a narrow-band FM signal with identical carriers, modulating signals and modulation indices of 0.1 are a

An AM signal is detected using an envelope detector. The carrier frequency and modulating signal frequency are 1 MHz and

A system described by the following differential equation $$$\frac{d^2y}{dt^2}+3\frac{dy}{dt}+2y=x\left(t\right)$$$ is i

Consider the signal flow graph shown in Figure. The gain $$\frac{x_5}{x_1}$$ is

Consider the Bode magnitude plot shown in figure. The transfer function H(s) is

For the polynomial P(s) = s5 + s4 + 2s3 + 2s2 + 3s + 15 ,the number of roots which lie in the right half of the s-plane

A causal system having the transfer function $$G\left(s\right)\;=\;\frac1{s\;+\;2}$$ is excited with 10u(t). The time at

If A = $$\left[ {\matrix{ { - 2} & 2 \cr 1 & { - 3} \cr } } \right],$$ then sin At is

Given A $$ = \left[ {\matrix{ 1 & 0 \cr 0 & 1 \cr } } \right],$$ the state transition ma

The state variable equations of a system are: $$${\mathop {{x_1} = - 3{x_1} - x}\limits^ \bullet _2} + u$$$ $$${\matho

A system has poles at 0.01 Hz, 1Hz and 80 Hz; zeroes at 5hz, 100 Hz and 200 Hz. The approximate phase of the system resp

Figure shows the internal schematic of a TTL AND-OR-Invert (AOI) gate. For the inputs shown in Figure, the output Y is

11001, 1001 and 111001 correspond to the 2’s complement representation of which one of the following sets of number?

The range of signed decimal numbers that can be represented by 6-bite 1’s complement number is

In the modulo-6 ripple counter shown in the figure, the output of the 2-input gate is used to clear the J-K flip-flops.

Choose the correct one from among the alternatives A, B, C, D after matching an item from Group 1 with the most appropri

A master slave flip-flop has the characteristic that

The minimum number of 2 to 1 multiplexers required to realize a 4 to 1 mutliplexer is

A Boolean function 'f' of two variables x and y is defined as follows: f(0,0)=f(0,1)=f(1,1)=1;f(1,0)=0 Assuming compleme

The Boolean expression AC + B$$\overline C $$ is equivalent to

A lossless transmission line is terminated in a load which reflects a part of the incident power. The measured VSWR is 2

Consider a lossless antenna with a directive gain of + 6 dB. If 1 m W of power is fed to it the total power radiated by

The phase velocity of an electromagnetic wave propagating in a hollow metallic rectangular waveguide in the $$T{E_{10}}$

A plane electromagnetic wave propagating in free space in incident normally on a large slab of loss-less, non-magnetic,

Consider an impedance Z = R + jX marked with point P in an impedance Smith chart as shown in Fig. The movement from poin

Consider a 300$$\Omega $$, quarter-wave long (at 1 GHz) transmission line as shown in Fig. It is connected to a 10V, 50$

The drain of an n-channel MOSFET is shorted to the gate so that VGS = VDS. The threshold voltage (VT) of MOSFET is 1 V.

Consider the following statements S1 and S2. S1: The threshold voltage (VT) of a MOS capacitor decreases with increase i

The impurity commonly used for realizing the base region of a silicon n-p-n transistor is

Consider the sequence of 8085 instructions given below. LXI H, 9258 MOV A, M CMA MOV M, A Which one of the follo

It is desired to multiply the numbers 0AH by 0BH and store the result in the accumulator. The numbers are available in r

The number of memory cycles required to execute the following 8085 instructions (I.) LDA 3000H (II.) LXI D, FOF 1H W

The 8255 Programmable Peripheral Interface is used as described below. I. An A/D converter is interfaced to a microproce

For the circuit shown in Figure, the initial conditions are zeros. Its transfer function $$H(s) = {{{V_c}\,(s)} \over {

For the lattice circuit shown in Fig., $${Z_a} = j\,2\,\Omega \,\,and\,\,{Z_b} = \,\,2\Omega $$. The values of the open

The transfer function $$H\left( s \right) = {{{V_0}\left( s \right)} \over {{V_i}\left( s \right)}}$$ of an R-L-C circui

For the circuit shown in figure, the time constant $$RC = 1$$ $$ms$$. The input voltage is $${v_i}\left( t \right) = \sq

The circuit shown in figure, with $$R = 1/3\Omega $$, $$L = 1/4H$$, $$C = 3F$$ has input voltage $$v\left( t \right) = \

Consider the following statements S1 and S2. S1: The $$\beta$$ of a bipolar transistor reduces if the base width is incr

The circuit shown in Fig, has initial current $${\mathrm i}_\mathrm L\left(0^-\right)\;=\;1\;\mathrm A$$ through the ind

For the R-L circuit shown in Fig, the input voltage. vi(t) = u (t) The current i(t) is

The equivalent inductance measured between the terminals 1 and 2 for the circuit shown in figure, is

Let x(t) and y(t) (with Fourier transforms X(f) and Y(f) respectively) be related as shown in Fig.(1) & (2). Then Y

A 1 kHz sinusoidal signal is ideally sampled at 1500 samples /sec and the sampled signal is passed through an ideal low-

Consider the signal x(t) shown in Fig. Let h(t) denote the impulse response of the filter matched to x(t), with h(t) bei

A system has poles at 0.01 Hz, 1 Hz and 80 Hz; zeros at 5 Hz, 100 Hz and 200 Hz. The approximate phase of the system res

The impulse response $$h\left[ n \right]$$ of a linear time invariant system is given as $$h\left[ n \right] = \left\{

A causal LTI system is described by the difference equation $$2y\left[ n \right] = ay\left[ {n - 2} \right] - 2x\left[ n

The impulse response $$h\left[ n \right]$$ of a linear time-invariant system is given by $$h\left[ n \right]$$ $$ = u\le

Consider the sequence $$x[n] = [ - \,4 - \,j5,\,\mathop {1 + j2}\limits_ \uparrow ,\,\,4]$$ The conjugate anti-symm

A causal system having the transfer function H(s) = $${1 \over {s + 2}}$$, is excited with 10 u(t). The time at which th

A rectangular pulse train s(t) as shown in Fig.1 is convolved with the signal $${\cos ^2}$$ ($$4\pi \,{10^{3\,}}$$t). Th

A system described by the differential equation: $${{{d^2}y} \over {d{t^2}}} + 3{{dy} \over {dt}} + 2y = x(t)$$ is initi

The z transform of a system is H(z) = $${z \over {z - 0.2}}$$ . If the ROC is $$\left| {z\,} \right|$$ < 0.2, then

The Fourier transform of a conjugate symmetric function is always