List of top Electronics and Communication Engineering Questions

From the following Routh array table, which tells us that there are
\( S^n \)Col 1Col 2Col 3
\( S^5 \)2 1 
\( S^4 \)321
\( S^3 \)\(-\frac{4}{3}\)\(-\frac{2}{3}\) 
\( S^2 \)\(\frac{1}{2}\)1 
\( S^1 \)2  
\( S^0 \)1  
The \(a_{ij}\) is the ___ of the branch directed from node \(x_i\) to \(x_j\) in signal flow graph. (Note: The blank is after "is the". Assuming it asks what \(a_{ij}\) represents.)
LEA CX,[BX][SI] instruction of 8086 microprocessor indicates where (BX) and (SI) represent the content of BX and SI respectively
For n inputs, k product terms and m outputs, the internal logic of the PLA consists of
The characteristic equation of SR flip-flop is
In priority encoder, if two or more inputs are equal to ____ will take highest priority
The 8-to-3 encoder is also called
The values of the segments 'abcdefg' of seven segment display for the BCD input of '0101'? (Assuming standard segment labeling: a-top, b-top-right, c-bottom-right, d-bottom, e-bottom-left, f-top-left, g-middle. And BCD '0101' is decimal 5.)
Quantization error in ADC is due to
An n-to-m line decoder is used to generate (Note: "n-to-m line decoder" where \(m = 2^n\))
Any Boolean function of n+1 variables can be implemented with ___ multiplexer
Simplify \( AB + A\bar{C} + \overline{A}BC(AB+C) \)
Convert a decimal number 3509.14453125 into a hexadecimal number
Threshold voltage at the comparator of 555 timer is approximately
If the input to an OP-AMP comparator is a sine wave, then the output is a
The cut off frequency of the following fourth order filter is
cut off frequency of the following fourth order filter is
Identify the following circuit
Second order Low pass filter
To eliminate cross over distortion in Class B power amplifier, the circuit should have
A 'Class A' Common Emitter amplifier with \(V_{CC} = 20 \text{ V}\) draws a current I = 5A and feed a load of \(40\Omega\) through a step-up transformer N2/N1=3.16. Find the efficiency of the amplifier when it is properly matched for maximum power supply.
Wein bridge oscillator is a
When the negative feedback is applied to an amplifier of gain 100, the overall gain falls to 50. If the same feedback factor is maintained, the value of the amplifier gain required for the overall gain of 75 is
Which of the following is not correct with respect to Darlington amplifier?
The midband gain of an amplifier is 100 and the lower cutoff frequency is 1 KHz. Find the gain of the amplifier at a frequency of 20 Hz.
Half wave and Full wave rectifiers produce nearly identical ____ for equal values of transformer secondary voltage.
The maximum dc output power in a Half wave rectifier occurs when the load resistance is ____ the diode forward resistance.