## Category: Semiconductor Electronic: Material, Devices And Simple Circuits

## Write the truth table for circuit given in Fig. 14.47 below consisting of NOR gates and identify the logic operation (OR, AND, NOT) which this circuit is performing.

## You are given two circuits as shown In Fig. 14.46, which consist of NAND gates. Identify the logic operation carried out by the two circuits.

## Write the truth table for a NAND Gate connected as given in Fig. 14.45.

## You are given he two circuits as shown in Fig.14.44. Show that current (a) acts as OR gate while the circuit (b) acts as AND gate.

## In a p-n junction diode, the current I can be expressed as

## In an intrinsic semiconductor the energy gap g E is 1.2 eV. Its hole mobility is much smaller than electron mobility and independent of temperature. What is the ratio between conductivity T 600K and that at 300k? Assume that the temperature dependence of intrinsic carrier

In an intrinsic semiconductor the energy gap g E is 1.2 eV. Its hole mobility is much smaller than electron mobility and independent of temperature. What is the ratio between conductivity T 600K and that at 300k? Assume that the temperature dependence Read More …

## The number of silicon atoms per m3 is 5×1028 .this is doped simultaneously with 5×1022 atoms per m3 of Arsenic and 20 5×10 per m3 atoms of indium. Calculate the number of electrons and holes. Given that nt = 1.5 × 1016 in m-3. Is the material n-type or p-type?

The number of silicon atoms per m3 is 5×1028 .this is doped simultaneously with 5×1022 atoms per m3 of Arsenic and 20 5×10 per m3 atoms of indium. Calculate the number of electrons and holes. Given that nt = 1.5 × 1016 in m-3. Read More …

## A p-n photodiode is fabricated from a semiconductor with band gap of 2.8 eV. Can it detect a wavelength of 6000 nm?

## Two amplifier are connected one after the other in series (cascaded). The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20. If the input signal is 0.01 volt, calculate the output ac signal.

## For a CE-transmitter amplifier, the audio signal voltage across the collector resistance of 2 k Ω is 2 V. Suppose the current amplification factor of the transistor is 100, find the input signal voltage and base current, if the base resistance is 1 k Ω .

For a CE-transmitter amplifier, the audio signal voltage across the collector resistance of 2 k Ω is 2 V. Suppose the current amplification factor of the transistor is 100, find the input signal voltage and base current, if the base resistance is Read More …