Semiconductor Electronics

For the given circuit (shown in part (A)) the time dependent input voltage $v_{in}(t)$ and corresponding output $v_o(t)$ are shown in part (B) and part (C), respectively. Identify the components that are used in the circuit between points X and Y.

If $X$ and $Y$ are the inputs, the given circuit works as ________.

Two 4 bits binary numbers, $A=1101$ and $B=1010$ are given in the inputs of a logic circuit shown in figure below. The output ($Y$) will be :

Consider a circuit consisting of a capacitor (20 μF), resistor (100 Ω) and two identical diodes as shown in figure. The resistance of diode under forward biasing condition is 10 Ω. The time constant of the circuit is $\alpha\times10^{-3}$ s. The value of $\alpha$ is ________.

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R

Assertion A: A diode under reverse-biased condition provides very small current which is nearly independent of voltage until a critical limit at which the current increases drastically.

Reason R: Below the critical voltage limit, only majority charge carriers flow which increases drastically above critical voltage.

choose the correct answer from the options given below

A diode has Zener voltage of 10 V and maximum power dissipation of 0.5 W, then the minimum resistance to be used in series with this diode for safety when it is connected to a 25 V power supply is ________ Ω.

For the given logic circuit, which of the following inputs combination will make both LED-1 and LED-2 to glow?

In a semiconductor p-n diode, the doping concentrations on p-side and n-side are $10^{15}$ atoms/cm³ and $10^{18}$ atoms/cm³, respectively. Which one of the following statements is true ?

The maximum rated power of the LED is 2 mW and it is used in the circuit with input voltage of 5 V as shown in the figure below. The current through resistance $R_S$ is 0.5 mA.

The minimum value of the resistance of $R_S$, to ensure that the LED is not damaged is ________ kΩ.

Refer to the logic circuit given below. For two inputs ($A=1$, $B=1$) and ($A=0$, $B=1$), output (Y) will be ________.

The output $Y$ for the given inputs $A$ and $B$ to the circuit is :

In the given circuit, the value of current $I_L$ will be ______ mA.

(When $R_L=1\ \mathrm{k\Omega}$)

The photodiode is used to detect the optical signals. These diodes are preferably operated in reverse biased mode because :

Identify the logic operation performed by the given circuit :

The I-V characteristics of a p-n junction diode in forward bias is shown in the figure. The ratio of dynamic resistance, corresponding to forward bias voltage of 2 V and 4 V respectively, is :

As per the given circuit, the value of current through the battery will be ______ A.

Identify the correct Logic Gate for the following output (Y) of two inputs A and B.

The cut-off voltage of the diodes (shown in figure) in forward bias is 0.6 V. The current through the resister of 40 $\Omega$ is ______ mA.

For using a multimeter to identify diode from electrical components, choose the correct statement out of the following about the diode :

In the given circuit the input voltage $V_{in}$ is shown in figure. The cut-in voltage of p-n junction diode ($D_1$ or $D_2$) is 0.6 V. Which of the following output voltage ($V_o$) waveform across the diode is correct ?