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V RD-M, qd-2 PF, PF,: Cc-0 - Cs-2 Rc-1

This document is the final exam for an Analog and Digital Electronics course. The exam is 1 hour and 10 minutes long and is worth a total of 40 marks. Section 1 contains 3 questions worth 6, 6, and 8 marks respectively about determining cutoff frequencies for a circuit, determining the output for another circuit, and calculating input/output power and efficiency for a class B push-pull amplifier. Section 2 contains 3 questions worth 6, 4, and 6 marks about drawing and explaining the working of a Wien bridge oscillator, drawing integrator circuits, and explaining the stability of different amplifiers using Nyquist criteria.

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syed furqan javed
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39 views2 pages

V RD-M, qd-2 PF, PF,: Cc-0 - Cs-2 Rc-1

This document is the final exam for an Analog and Digital Electronics course. The exam is 1 hour and 10 minutes long and is worth a total of 40 marks. Section 1 contains 3 questions worth 6, 6, and 8 marks respectively about determining cutoff frequencies for a circuit, determining the output for another circuit, and calculating input/output power and efficiency for a class B push-pull amplifier. Section 2 contains 3 questions worth 6, 4, and 6 marks about drawing and explaining the working of a Wien bridge oscillator, drawing integrator circuits, and explaining the stability of different amplifiers using Nyquist criteria.

Uploaded by

syed furqan javed
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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An a l o g u e a nd DIgita l Ele ctronics Fin a l E xa m

To ta l Ti me 1 h o u r 10 m i n u t e s T o t a l M a rks 4 0

S ec ti o n 1

1-D e t e rm i n e t h e hi g h-c uto ff fre q u e n c i e s I.e ., f... An d F, lo for t h e netwo rk o f Fi g . B e l o w us ing the

p arameters as me n ti o n e d b e l o w:

Cc =0 .0 1 m i c ro F, Cc-0 . S m i c ro F, Cs-2 m ic r oF
V 5=-
Rlq=10 k n, Rc-1 M ft, Ro-4 .7 kfl, Rs
1 kfl, RL-2 .2 kt l , IDS S -8 mA, Vp-4 V, rd-m fl, VDD·
20 V wi th t h e a d d i t i o n of qd-2 P F, Cg , . 4 pF, Cd , -0 .5 P F, Cwi =5 pF, Cwo · 6 PF l c L0 3] , (6)

2 -D e t e rm i n e t h e o utp ut fo r t h e circuit o f ri g . B e l o w wi t h c o m p o n e n t s Rf· 2 MQ , R,-50 k n, Rz ·


10 0 k n. An d R3 -4 0 0 kn . V, · SO m v s i n (10 0 0 t ) and V)-10 m v s i n(3 0 0 0 t ) [ C L 0 2 ] , (6 )
3 -D r a w a cla s s p ullamp l i fier circuit,For a a m p l i fi e r p ro vi d i n g a 20 -V p e a k s i g nal to
B pus h· cla s s B

a 16 fl l o a d (s p e a ke r) and a p o we r s u p p l y of Vic -3 0 V, d e t e rm i n e t h e i n p u t p o we r, o utp ut p o we r,


a n d circuit
effic i enc y I C L 0 4 ] , (8)

S e ction 2

1· Draw t h e circuit of Wi en-B ri d g e osc illa tora n d e xp l a i n its wo rki n g b ri e fl y b y s h o wi n g the


freq uenc y re la tions hip (6)
2-Draw th e circuit dia gra ms of ope ra tiona l a m p l i fi e r wo rki n g as i nteg rato r d ri ve i ts
re l a t i o n s h i p
-Explain whi c h
(4 )
a mpl i fi e r is s tab l eand wh i c h is n o t s tab l e b y m e n t i o n i n g t h e N yq u i s t c r ite r ia
condition for s tab i l i ty Expla in t h e a n s we r in n o m o re than S l i nes (4 )

the'"l,lie'""it,] 16 ）

Vp.)ov
Yv-S·

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