ISRO Scientist or Engineer Electronics Dec 2017
For the following questions answer them individually
Consider the system with x(t) as input and y(t) as output. The frequency domain characteristics are shown in the figure. Which combination of A and B will give y as result?
The $$R = \frac{1}{3}$$ convolution encoder defined by transfer functions
$$H_{1}(Z) =1+Z^{-1}$$
$$H_{2}(Z) =1+Z^{-2}$$
$$H_{3}(Z) =1+Z^{-1}+Z^{-2}$$
Consider the feedback systemÂ
$$G(s) = \frac{K(s + 4)}{s(s + 1)}Â H(s) = \frac{1}{s + 2}$$
The value of gain for which system is marginally stable is
Consider the Bode plots (magnitude and phase) of two different open loop transfer functions of two unity feedback systems. The open loop transfer functions have poles in right half plane. The closed loop system formed from these open loop systems. Which of the following holds true?
The steady state response for an input X(s) = K/s to a system whose transfer function is H(s) in time domain is
$$H(s)=\frac{1}{(s+5)(s+2)}$$
Consider a closed loop stable phase locked loop system as shown in the diagram below
The system is capable of producing zero steady state error E(t) for
A dielectric is subjected to alternating electric field. The dielectric losses are proportional to
