# Semiconductor Devices

Questions & Solutions

## In the circuit shown in fig. Find the value of R_C.

Q: In the circuit shown in fig. Find the value of RC

## For the transistor circuit shown in figure, evaluate V_E , R_B, R_E , given I_c = 1 mA, V_CE = 3 V, V_BE = 0.5 V and V_CC = 12 V,  β = 100.

Q: For the transistor circuit shown in figure, evaluate VE , RB , RE , given Ic = 1 mA , VCE = 3 V, VBE = 0.5 V and VCC = 12 V,  β = 100

## Consider a box with three terminals on top of it as shown in figure.Three components namely, two germanium diodes and one resistor are connected across these three terminals in some arrangement….

Q: Consider a box with three terminals on top of it as shown in figure.

Three components namely, two germanium diodes and one resistor are connected across these three terminals in some arrangement.
A student performs an experiment in which any two of these three terminals are connected in the circuit shown in figure.
The student obtains graphs of current-voltage characteristics for unknown combination of components between the two terminals connected in the circuit. The graphs are

(i) when A is positive and B is negative

(ii) when A is negative and B is positive

(iii) when B is negative and C is positive

(iv) when B is positive and C is negative

(v) when A is positive and C is negative

(vi) when A is negative and C is positive

## Assuming the ideal diode draw, the output waveform for the circuit given in fig. explain the waveform.

Q: Assuming the ideal diode draw, the output waveform for the circuit given in fig. explain the waveform.

## Consider the circuit arrangement shown in figure for studying input and output characteristics of n-p-n transistor in CE configuration. Select the values of R_B and R_c for a transistor whose V_BE = 0.7 V, so that the transistor is operating at point Q as shown in the characteristics

Q: Consider the circuit arrangement shown in figure for studying input and output characteristics of n-p-n transistor in CE configuration. Select the values of RB and Rc for a transistor whose VBE = 0.7 V, so that the transistor is operating at point Q as shown in the characteristics

Given that the input impedance of the transistor is very small and VCC = VBB = 16 V, also find the voltage gain and power gain of circuit making appropriate assumptions.