Questions & Answers of Sampling theorem

Question No. 20

A continuous-time sinusoid of frequency 33 Hz is multiplied with a periodic Dirac impulse train of frequency 46 Hz. The resulting signal is passed through an ideal analog low-pass filter with a cutoff frequency of 23 Hz. The fundamental frequency (in Hz) of the output is _________

Question No. 216

Consider the signal xt=cos6πt+sin8πt, where t is in seconds. The Nyquist sampling rate (in samples/second) for the signal yt=x2t+5 is

Question No. 133

The signal cos10πt+π4 is ideally sampled at a sampling frequency of 15 Hz. The sampled signal is passed through a filter with impulse response sinπtπtcos40πt-π2 . The filter output is

Question No. 255

Consider a continuous-time signal defined as
       $x\left(t\right)=\left(\frac{\sin\left(\pi t/2\right)}{\left(\pi t/2\right)}\right)\ast\sum_\limits{n=-\infty}^\infty\delta\left(t-10n\right)$
where '*' denotes the convolution operation and t is in seconds. The Nyquist sampling rate (in samples/sec) for x(t) is ___________.

Question No. 324

For a given sample-and-hold circuit, if the value of the hold capacitor is increased, then

Question No. 44

An LTI system having transfer function s2+1s2+2s+1 and input x(t)=sin(t+1) is in steady state. The output is sampled at a rate ωs rad/s to obtain the final output {y(k)}. Which of the following is true?