ISRO Scientist or Engineer Electronics 2012

For Butterworth & Chebyshevfilters, the correct statementis :

In a feedback series regulator circuit, the output voltage is regulated by controlling th

In a fullwave rectifier circuit with centre tap transformer, if voltage between one end of secondary winding and centre tap is 300V peak, then PIV (peak inverse voltage)is

The rms value of the periodic waveform as shown in Figure is

The approximate equivalent resistance between terminals A and B for the following infinite ladder network comprising of 1Ω &2Ω resistors is:

If the step response to the input step amplitude of 1 V is given by $$V_{o}(t)=(1-e^{\frac{-t}{RC}})$$ the network can be represented by:

For a parallel RC circuit as shown in figure, R = 20 QN & C = 0.9 vF, which is to be matched to 50 Q over a bandwidth,

$$\int_{0}^{\infty} \ln \frac{1}{\mid r \mid} dw \leq \frac{\pi}{RC}$$

The circuit has to be matched over 6 GHz to 18 GHz, What is the  very best r that can be achieved:

In this circuit, V is a sinusoid input with freq f, current i contains:

The effect of phase error of local oscillator on spectral components in’ coherent detection of SSB Amplitude modulated signal is :

The maximum transmission power efficiency of DSB-C Amplitude modulation is: