Q. An op-amp based circuit is implemented as shown below. In the above circuit, assume the op-amp to be ideal. The voltage (in volts, correct to one decimal place) at node A, connected to the negative input of the op-amp as indicated in the figure is . Ans: 0.4 – 0.6
An op-amp based circuit is implemented as shown below Read More »
Q. A dc current of 26 μA flows through the circuit shown. The diode in the circuit is forward biased and it has an ideality factor of one. At the quiescent point, the diode has a junction capacitance of 0.5 nF . Its neutral region resistances can be neglected. Assume that the room temperature thermal
Q. For the circuit given in the figure, the magnitude of the loop current (in amperes, correct to three decimal places) 0.5 second after closing the switch is Ans: 0.284 – 0.348
For the circuit given in the figure, the magnitude of the loop current Read More »
Q. For the circuit given in the figure, the voltage VC (in volts) across the capacitor is Ans: Option C
For the circuit given in the figure, the voltage VC (in volts) across the capacitor is Read More »
Q. The distance (in meters) a wave has to propagate in a medium having a skin depth of 0.1 m so that the amplitude of the wave attenuates by 20 dB, is (A) 0.12 (B) 0.23 (C) 0.46 (D) 2.3 Ans: 0.23
Q. A 2×2 ROM array is built with the help of diodes as shown in the circuit below. Here W0 and W1 are signals that select the word lines and B0 and B1 are signals that are output of the sense amps based on the stored data corresponding to the bit lines during the read
Q. A four-variable Boolean function is realized using 4´1 multiplexers as shown in the figure The minimized expression for F(U, V ,W, X ) is Ans: (UV̅ + U̅V) W̅
Q. Red (R), Green (G) and Blue (B) Light Emitting Diodes (LEDs) were fabricated using p-n junctions of three different inorganic semiconductors having different band-gaps. The built- in voltages of red, green and blue diodes are VR, VG and VB, respectively. Assume donor and acceptor doping to be the same (NA and ND, respectively) in
Q. Consider a white Gaussian noise process 𝑁(𝑡) with two-sided power spectral density 𝑆𝑁 (𝑓) = 0.5 W/Hz as input to a filter with impulse response 0.5𝑒−𝑡2/2 (where 𝑡 is in seconds) resulting in output 𝑌(𝑡). The power in 𝑌(𝑡) in watts is (A) 0.11 (B) 0.22 (C) 0.33 (D) 0.44 Ans: 0.22
Consider a white Gaussian noise process 𝑁(𝑡) with two-sided power spectral density 𝑆𝑁 Read More »
Q. The circuit shown in the figure is used to provide regulated voltage (5 V) across the 1 kW resistor. Assume that the Zener diode has a constant reverse breakdown voltage for a current range, starting from a minimum required Zener current, IZ min = 2 mA to its maximum allowable current. The input voltage VI
