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1

### GATE EE 2017 Set 2

For the circuit shown in the figure below, it is given that $${V_{CE}} = {{{V_{CC}}} \over 2}.$$ The transistor has $$\beta = 29$$ and $${V_{BE}} = 0.7\,\,V$$ when the $$B$$-$$E$$ junction is forward biased. For this circuit, the value of $${{{R_B}} \over R}$$ is

A
$$43$$
B
$$92$$
C
$$121$$
D
$$129$$
2

### GATE EE 2017 Set 1

Numerical
The circuit shown in the figure uses matched transistors with a thermal voltage $${V_T} = 25\,mV.$$ The base currents of the transistors are negligible. The value of the resistance $$R$$ in $$k\Omega$$ that is required to provide $$1\,\,\,\mu A$$ bias current for the differential amplifier block shown is ____________. Correct answer is between 170 and 174
3

### GATE EE 2012

The voltage gain $${A_V}$$ of the circuit shown below is A
$$\left| {{A_V}} \right| \approx 200$$
B
$$\left| {{A_V}} \right| \approx 100$$
C
$$\left| {{A_V}} \right| \approx 20$$
D
$$\left| {{A_V}} \right| \approx 10$$
4

### GATE EE 2011

The transistor used in the circuit shown below has a $$\beta$$ of $$30$$ and $${{\rm I}_{CBO}}$$ is negligible. If the forward voltage drop of diode is $$0.7V.$$ Then the current through collector will be

A
$$168$$ $$mA$$
B
$$108$$ $$mA$$
C
$$20.54$$ $$mA$$
D
$$5.36$$ $$mA$$
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