A television signal is sampled at a rate of 20% above the Nyquist rate. The signal has a bandwidth of 6 MHz. The samples are quantized into 1024 levels. The minimum bandwidth required to transmit this signal would be ____M bits/sec.
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Solution
Nyquist rate = 2× 6MHz =12 MHz
The actual sampling rate
= 1.2 × 12 =14.4 MHz
1024 = 210, So, that 10 bits orbinary pulses are needed to encode each sample,
Minimum bandwidth = 14.4 M × 10 = 144 Mbits/sec.
The loop transfer function of a system is given by
\(G(s).H(s)=\frac{K(s+10)^{2}(s+100)}{s(s+25)}\)the number of loci terminating at infinity is ______
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Solution
As there is no zero at infinity, the no. of loci terminating at infinity is zero.
A load centre is at an equidistant from the two thermal generating stations G1 and G2 as shown in the figure. The fuel cost characteristics of the generating stations are given by
where, P1 and P2 are generation in MW of G1 and G2 respectively. For most economic generation to meet 300 MW of load P1 and P2, respectively are
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Solution
The contents of memory locations 2000 H, 2001 H and 2002 Hare AAH, BBH and CCH respectively. What are the contents of H and L registers after executing the following instructions in sequence?
LXIH,2001H
LHLD 2001H
Select the correct answer using the codes given below:
For the counter 0, 1, 2, 3,4, find minimum of terms for synchronous counter using J K flip flop.
The switch in figure shown below has been in position 1 for a long time and is then moved to position 2 at t = 0.
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Solution
A linear time invariant system is describe by the following dynamic equation
the system is
In an 8085 μP system, the RST instruction will cause an interrupt
An analog periodic signal is defined as follows
where, n = …..–2, –1, 0, 1, 2, ……
The Fourier series of the above signal contains
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Solution
Consider the following statements in respect of important features of IGBT
1.It has a high impedance gate as that of a MOSFET.
2.It has a low on state voltage as that of a BJT.
3.It can block negative voltages as in the case of GTO.
Which of these statements are correct?
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Solution
IGBT have the following characteristics
(i)IGBT has a high impedance gate as that of a MOSFET.
(ii)IGBT has a low ON state voltage as that of a BJT.
(iii)IGBT can block negative voltages as in the case of GTO.