ISRO Scientist or Engineer Electronics Dec 2017
For the following questions answer them individually
Y-parameter of a two port network is shown below. A 1 Ω resistor is connected to the network as shown. Find out the Y parameter of the whole network.
For the circuit shown below, $$Z_{1}=K_{1} \times \frac{(s+2)}{(s+5)}$$. Find $$ Z_{2}$$, where $$K_{1}$$ and $$K_{2}$$ are constants containing circuit element values
Following is the small signal high frequency equivalent circuit of a common source amplifier $$\frac{V_{o}}{V_{i}}$$ will be of the form
$$(K, Z_{1},a_{o},a_{1},a_{2},a_{3}$$, are constants containing circuit elements)
The error in measurement of a dc voltmeter with input signal: 1.5 V, voltage range: 2 V, accuracy : $$\pm$$ (25 ppm of reading + 5 ppm of range) is
Consider the signal $$x(t)= \begin{cases}2\cos (t)+ \cos(2t) & t < 0\\2\sin (t)+ \sin(2t) & t \geq 0\end{cases}$$
The signal X(t) is:
Consider the system $$R[m]=\sum_{n=0}^{N-1} Y[n] x[n-m]$$ where y[n] and x[n] are real periodic signals with period N. The above output can be obtained using
Consider the system defined by $$\frac{d^{2}y}{dt^{2}}+(a+b)\frac{dy}{dt}+ab=x(t); a>0,b>0$$ can be realized using which impulse response function
A continuous time signal has frequency content at f = 10MHz, 50MHz and 70MHz. The signal is sampled at sampling frequency of 56MHz. The frequency content of output will be
