The load current I_{0} through R_{L} is
The number of times the LED glows is ________
In the opamp circuit shown, the Zener diodes Z1 and Z2 clamp the output voltage V_{0} to +5 V or −5 V. The switch S is initially closed and is opened at time t=0.
The time t=t_{1} (in seconds) at which V_{0} changes state is ________
The output voltage (in millivolts) is ________
In the circuit shown, assume that the opamp is ideal. The bridge output voltage V_{0} (in mV) for $\delta $ = 0.05 is ____.
In the bistable circuit shown, the ideal opamp has saturation levels of $\pm $ 5 V. The value of R_{1}(in kΩ) that gives a hysteresis width of 500 mV is _________
Assuming that the opamp in the circuit shown below is ideal, the output voltage V_{0} (in volts)
For the voltage regulator circuit shown, the input voltage (V_{in}) is 20 V ± 20% and the regulated output voltage (V_{out}) is 10 V. Assume the opamp to be ideal. For a load R_{L} drawing 200 mA, the maximum power dissipation in Q_{1} (in Watts) is __________.
In the circuit shown using an ideal opamp, the 3-dB cut-off frequency (in Hz) is _____.
In the circuit shown, assume that the opamp is ideal. If the gain (V_{o}/V_{in}) is –12, the value of R (in kΩ) is ____.
In the low-pass filter shown in the figure, for a cut-off frequency of 5 kHz , the value of R_{2} (in kΩ) is _____________.
In the voltage regulator circuit shown in the figure, the op-amp is ideal. The BJT has V_{BE} = 0.7 V and β = 100, and the zener voltage is 4.7 V. For a regulated output of 9 V, the value of R (in Ω) is _______.
In the circuit shown, the op-amp has finite input impedance, infinite voltage gain and zero input offset voltage. The output voltage V_{OUT} is
In the differential amplifier shown in the figure, the magnitudes of the common-mode and differential-mode gains are A_{cm} and A_{d}, respectively. If the resistance R_{E} is increased, then
Assuming that the Op-amp in the circuit shown is ideal, V_{o} is given by
The circuit shown represents
Assuming the OP-AMP to be ideal, the voltage gain of the amplifier shown below is
The transfer characteristic for the precision rectifier circuit shown below is (assume ideal OP-AMP and practical diodes)
In the circuit shown below, the op-amp is ideal, the transistor has V_{BE} = 0.6 V and β = 150. Decide whether the feedback in the circuit is positive or negative and determine the voltage V at the output of the op-amp
Consider the following circuit using an ideal OPAMP. The I-V characteristics of the diode is described by the relation $I={I}_{o}\left({e}^{\frac{v}{{v}_{r}}}-1\right)$ where V_{T} = 25mV, I_{o} = 1$\mu $A and V is the voltage across the diode (taken as positive for forward bias).
For an input voltage V_{i} = -1V, the output voltage V_{o} is
The OPAMP circuit shown above represents a
For the Op-Amp circuit shown in the figure, V_{o} is
In the Op-Amp circuit shown, assume that the diode current follows the equation I = I_{S} exp(V/V_{T}). For V_{i} = 2 V, V_{o} = V_{o}_{1} and for V_{i} = 4 V, V_{o} = V_{o}_{2}. The relationship between V_{o}_{1} and V_{o}_{2} is
Consider the Op-Amp circuit shown in the figure.
The transfer function V_{0}(s)/V_{i}(s) is
If ${V}_{i}={V}_{1}\mathrm{sin}\left(\omega t\right)$ and $V_o=V_2\sin\left(\omega t+\phi\right)$, then the minimum and maximum values of $\phi$ (in radians) are respectively