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What do you mean by term short noise? Write down the expression for the short noise current in a diode.
State the noise figure of an amplifier. Compute the noise figure of a vacuum tube amplifier supposing appropriate parameter.
Define the term equivalent noise temperature of a radio receiver. Under what conditions could this be more helpful quantity than the noise figure?
The equivalent noise temperature of cooled parametric amplifier is 20 degree Kelvin. Determine the noise figure.
Define the term Compensation. Derive the expression for the Shunt Compensation and Low freq Compensation.
What are the benefits and drawbacks of the symmetrical and unsymmetrical triggering?
What are the applications of the mono stable Multi-vibrator? Why a Monostable multi-vibrator termed as ‘Delay Circuit’.
Differentiate between the Clipping Circuits and Comparators?
What is basic difference between output from clipping and clamping circuit?
What do you mean by Schottky diode? How Schottky diode is employed for reducing storage time of diode switch?
What do you mean by the term transition capacitance?
A pulse of 10V amplitude and pulse width of 1msec is applied to the low pass RC circuit. R = 30 Kohm, C = 0.2 microfarad. Sketch the Output waveform.
Why RC circuits are chosen over the RL circuits for large time constant applications.
What is the fundamental difference between linear and non-linear wave shaping circuits.
Describe the concept of Global positioning system for navigation.
With the help of block diagram describe the operation of the conical scan tracking radar.
What is the simplest method to degrade the performance of the conical scanning tracking radar?
Why does a high PRF pulse Doppler radar need a much larger improvement factor than low PRF MTI radar, supposing comparable performance in detecting moving targets in clutter?
What is the importance of MTI radar? Explain its operation. How are moving targets recognized on a PPI display by using MTI radar?
Derive an expression for the blind speeds of MTI radar. Describe the effect of large wavelength and large PRF on lowest blind speed of target.
State the Doppler principle of velocity determination.
In brief describe different types of losses occurring in the radar systems.
Illustrate the operating frequency, power requirements and expected range of an actual radar system.
Enlist the factors which find out the detection range of the radar.
Show that the theoretical efficiency of the reflex Klystron is around 27.78%.