Recent questions tagged frequency-response

A wireless digital transmission scheme is using $16$-QAM over an additive white Gaussian noise channel and a maximum-likelihood receiver. Consider the information bit rat...

The cutoff frequency ( $\text{in GHz}$ ) for the dominant $\mathrm{TE}_{10}$ mode of an air-filled rectangular waveguide of inner dimension $0.28$ inch $\times 0.14$ inch...

The open loop transfer function of a unity negative feedback system is $G(s)=\frac{k}{s\left(1+s T_1\right)\left(1+s T_2\right)}$, where $k, T_1$ and $T_2$ are positive c...

Let an input $x[n]$ having discrete-time Fourier transform$X\left(e^{j \Omega}\right)=1-e^{-j \Omega}+2 e^{-3 j \Omega}$ be passed through an LTI system. The frequency re...

The input to a series $\text{RLC}$ circuit is a sinusoidal voltage source and the output is the current in the circuit. Which of the following is true about the magnitude...

A communication channel has first-order low pass transfer function. The channel is used to transmit pulses at a symbol rate greater than the half-power frequency of the l...

A block diagram of a system is shown in the figure is draw the spectrum of the output signal with relative aptitudes of the frequencies.

The figure is shows the first stage of a superheterodyne receiver. The desired input signal is at a frequency of $700 \; \mathrm{MHz}$. The local oscillator $\text{(L.O)}...

An amplifier with resistive negative feedback has two left half plane poles in its open-loop transfer function. The amplifierwill always be unstable at high frequencieswi...

For the given circuit, which is in steady stateFind the frequency $\omega_{\mathrm{o}}$ at which the magnitude of the impedance across terminals $a, b$ reaches a maximum....

The figure shows a common base amplifier.(a) Write expressions for the time-constants associated with the capacitors, $C_{B}$ and $C_{S}$.(b) What is the approximate lowe...

The first dominant pole encountered in the frequency response of a compensated $\text{op - amp}$ is approximately at$5 \; \mathrm{~Hz}$$10 \; \mathrm{kHz}$$1 \; \mathrm{M...

The input to a channel is a bandpass signal. It is obtained by linearly modulating a sinusoidal carrier with a single-tone signal. The output of the channel due to this i...

A $\text{JFET}$ having $\mu=50$ and $r_{d}=10 \mathrm{~K} \Omega$ is used in a common - source configuration as shown in the given figure. The $\text{JFET}$ capacitances ...

Consider a feedback system with the open-loop transfer function, given by\[\mathrm{G}(s) \mathrm{H}(s)=\frac{\mathrm{K}}{s(2 s+1)}\]Examine the stability of the closed-lo...

For the feedback control system shown in the figure, the process transfer function is $G p(s)=\frac{1}{s(s+1)}$, and the complification factor of the power amplifier is $...

Three identical $\text{RC}$-coupled transistor amplifiers are cascaded. If each of the amplifiers has a frequency response as shown in the figure is the overall frequency...

A linear phase channel with phase delay $T_p$ and group delay $T_g$ must have$T_p=T_g=$ constant$T_p \propto f$ and $T_g \propto f$$T_p=$ constant and $T_g \propto f$$T_p...

The system with the open loop transfer function $\mathrm{G}(\mathrm{s}) \mathrm{H}(s)=\frac{1}{s\left(s^{2}+s+1\right)}$ has a gain margin of$-6 \mathrm{~dB}$$0 \mathrm{~...

From a measurement of the rise time of the output pulse of an amplifier whose input is a small amplitude square wave, one can estimate the following parameter of the ampl...

The oscillator circuit shown in the figure is has an ideal inverting amplifier. Its frequency of oscillation (in $\mathrm{Hz}$ ) is$\frac{1}{(2 \pi \sqrt{6} \mathrm{RC})}...

Data for Q. 63-64 are given below. Solve the problems and choose the correct answers.The system under consideration is an RC low-pass filter (RC-LPF) with $R=1.0 \mathrm{...

Data for Q. 63-64 are given below. Solve the problems and choose the correct answers.The system under consideration is an $R C$ low-pass filter (RC-LPF) with $R=1.0 \; \m...

For the circuit shown in in the figure, the time constant $\text{RC}=1 \mathrm{~ms}$. The input voltage is $v_{i}(t)=\sqrt{2}$ $\sin 10^{3} t$.The output voltage $v_{0}(t...

Consider the Bode magnitude plot shown in the given figure. The transfer function $\mathrm{H}(s)$ is$\frac{(s+10)}{(s+1)(s+100)}$$\frac{10(s+1)}{(s+1)(s+100)}$$\frac{10^{...