Recent questions in Op-amp Circuits

An astable multivibrator circuit using $\text{IC 555}$ timer is shown below. Assume that the circuit is oscillating steadily.The voltage $V_{C}$ across the capacitor vari...

Consider the Schmidt trigger circuit shown below.A triangular wave which goes from $-12 \mathrm{~V}$ to $12 \mathrm{~V}$ is applied to the inverting input of the $\text{O...

Negative feedback in amplifiersimproves the signal to noise ratio at the inputimproves the signal to noise ratio at the outputdoes not affect the signal to noise ratio at...

The bandwidth of an $n$-stage tuned amplifier, with each stage having a band width of $B$, is given by$\mathrm{B} / n$$\mathrm{B} / \sqrt{n}$$\mathrm{B} \sqrt{2^{1 / n}-1...

In the following astable multivibrator circuit, which properties of $v_{o}(t)$ depend on $R_{2}$?Only the frequencyOnly the amplitudeBoth the amplitude and the frequencyN...

In the circuit shown below, the $\text{op-amp}$ is ideal, the transistor has $V_{B E}=0.6 \mathrm{~V}$ and $\beta=150$. Decide whether the feedback in the circuit is posi...

The transfer characteristic for the precision rectifier circuit shown below is (assume ideal $\text{OP-AMP}$ and practical diodes)

An op. amp. has an offset voltage of $1 \mathrm{mV}$ and is ideal in all other respects. If this op. amp. is used in the circuit shown in the given figure, the output vol...

The circuit of given figure, uses an ideal op amp. For small positive values of $V_{\text {in' }}$, the circuit works asa halfwave rectifiera differentiatora logarithmic ...

Assume that the operational amplifier in given figure is ideal. The current, $I$, through the $1 \; \text{K ohm}$ resistor is $\dots$

In order that the circuit of Figure works properly as differentiator, it should be modified to ________ (draw the modified circuit)

Two non-inverting amplifiers, one having a unity gain and the other having a gain of twenty are made using identical operational amplifiers. As a compared to the unity ga...

In figure, the operational amplifier is ideal and its output can swing between $-15$ and $+15$ volts. The input $v_\rho$ which is zero for $t<0$, is switched to $5$ volts...

In figure, the operational amplifiers are ideal and their output can swing between $-15$ and $+15$ volts. Sketch on same diagram, the waveform of voltages $V_1$ and $V_2$...

The circuit below implements a filter between the input current $\mathrm{i}_{\mathrm{i}}$ and the output voltage $\mathrm{v}_{\mathrm{o}}$. Assume that the opamp is ideal...

In the circuit shown below, capacitors $\text{C}_1$ and $\text{C}_2$ are very large and are shorts at the input frequency. $\mathrm{v}_{\mathrm{i}}$ is a small signal inp...

An ideal $\text{OPAMP}$ circuit with a sinusoidal input is shown in the figure. The $3 \; \text{dB}$ frequency is the frequency at which the magnitude of the voltage gain...

For the following circuit with an ideal $\text{OPAMP},$ the difference between the maximum and the minimum values of the capacitor voltage $(V_{c})$ is ____________.$15 \...

A circuit with an ideal $\text{OPAMP}$ is shown. The Bode plot for the magnitude $\text{(in dB)}$ of the gain transfer function $(A_{V} (j \omega) = V_{\text{out}} (j \om...