1
GATE ECE 2001
Subjective
+5
-0
An emitter-follower amplifier is shown in the figure, Zi is the impedance looking into the base of the transistor and Z0 is the impedance looking into the emitter of the transistor GATE ECE 2001 Analog Circuits - Bipolar Junction Transistor Question 3 English

(a)Draw the small signal equivalent circuit of the amplifier.
(b)Obtain an expression for zi.
(c)Obtain an expression for z0.

2
GATE ECE 2000
Subjective
+5
-0
For the amplifier of given figure,
$${I_C}\, = \,1.3\,mA,\,{R_C}\, = \,2\,k\Omega ,\,{R_E}\, = \,500\,\Omega ,$$
$${V_T}\, = \,26\,mV,\,\beta \, = \,100,\,{V_{CC}}\, = \,15V,$$
$${V_s}\, = \,0.01\,\sin \left( {\omega t} \right)\,V\,and\,{C_b}\, = \,{C_C}\, = \,10\,\mu F.$$ GATE ECE 2000 Analog Circuits - Bipolar Junction Transistor Question 4 English

(a)What is the small-signal voltage gain, $${A_V} = {V_0}/{V_s}?$$
(b)What is the approximate $${A_{v,}}\,\,if\,\,{C_e}\,\,$$ is removed?
(c)What will $${V_0}\,be\,if\,{C_b}$$ is short circuited?

3
GATE ECE 1999
Subjective
+5
-0
A bipolar junction transistor amplifier circuit is shown in the figure. Assume that the current source Ibias is ideal, and the transistor has very large$$\beta ,\,\,{r_{b\,\,}} = \,\,0,$$ and the $${r_0}\, \to \,\infty $$. GATE ECE 1999 Analog Circuits - Bipolar Junction Transistor Question 5 English

Determine the ac small-signal mid-band and voltage gain $$\left( {{V_o}/{V_s}} \right),$$ input resistance (R1, and output resistance (R0) of the circuit. Assume $${V_{T\,\,}} = \,\,26\,mV.$$

4
GATE ECE 1998
Subjective
+5
-0
In the circuit of fig. Determine the resistance Ro seen by the output terminals, ignore the effects of R1 and R2. GATE ECE 1998 Analog Circuits - Bipolar Junction Transistor Question 2 English
GATE ECE Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12