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Unformatted text preview: EEZZO CIRCUITSI
Chagter # 8 Examples P 8.3“? A security alarm for an eiﬁce building door is mod 5 '1 7 We circuit of Figure P 83—10. The switch represents the . door interlock, and v is the alarm indicator voltage. Find vii) I l E
l_. for t > 0 for the circuit of Figure P 8310. The switch has been ..
' ‘ closed for a king time at t: 0‘. «moi meﬁwm
“megm.. . _ _ _ .d PEA2 The circuit shaminFigureP 8.42 is at steady state . t . _ , , , .t . , ‘5 before the switch closes at time t = O. The switch remains closed l ‘ . for 1.5 s and then opens. Determine the inductor current, 1'6), for _ 7 . _ __ 7 ._ __ _ _ _
1T ' t> 0. . 2+e‘0'5'A fur0<t<1.55 .J ; Annular. v(t) ,—..
3 — 0535"“0'5570‘1'5) A for 1.5 s < t _ FIGURE P 3.4—2 E F I .. . . . _ , ‘ _ .
, 1"? ‘ .7 i _——
"JAtﬁmi” »—.«QM£J——~ ~—7—J~I$——~_w~—m——~————————r—~~——~————— 1
E
I !
<3 1 P 8.53 The circuit in Figure P ‘853 contains a current 7 , A   ,   controlled current source. What restriction must be placed on the gain, B, ofthis dependent source in orderto guarantee sta _7 ____ , , ‘ .._ . .,,..
bility? P B. 6 3 The input to the circuit shown in Figure P 8. 63 is
the voltage of the voltage source v (t). The output 15 the current
across the inductor i .,.(I) Determine the output of this circuit
when the input 15 1: 5(0— — ——7 +13 11(th m .5 PE Hj: 7 +13 eLLth %€W‘L o it: till) L9: LL): :LV u s; JwaudgéL—tw
54L 7 _,____1e:@“ﬁ‘£vst ' ' DalmatiaJew
nWﬂWMT_gﬁ§ ________ f Wt.) A+gfwt 5%jc>z
gnaw Mewgcmem A 3Wﬂ " ﬁﬂaaﬁﬂbrww: ; H " ‘ MAMMW if %$+€Aaﬂy—W€:CJ§+7E¢2CE > 5 Mai .L >3” . ! 1
_lJ W_.___, uh ME “——._____.._ _..___ Lam—b Lm‘fleﬁﬁeM“ MLDEM_%MIWIE_bﬁ{lyimz_ey 399M : ad __5 a g__ n l — __W
gaff! w m z I: Z ‘_ ‘" ".3“ W“ ‘ “ ________ Hun—~—
Eff  — —L~—~E§x———ﬁ—@ﬁ%—i§» “ _ Mm“ ______T____
,HE‘; ——~m “mum ”__men ”a __W %
13$,me l: H ' "— IL? A“ “—“jevrﬂiswéﬁwn—
jgil —%———~ —a~ 454—— — __k _m 5._ _ ________+____
i5‘ i _h __H__ﬁ  ' 83+. '
‘ _ .ﬁ..___u,,__ H'—“l""‘l2”" QHév—‘EMw—m— ﬁt acuviyp
5 — W” “h“ ~—_. u~ ——
5‘ P 3.74 Find 12:09 for t>0 for the circuit shown in Figure
; j I. P 8.74 when 1'5 = [2 cos 21] HQ) EDA. ‘ —,55 10m _u _ _— ‘~—L—— “f
5m vc‘: 11%an _ _ _ _W __ _ _:_:_.1tj . w  2 ...—. mart High ME "I“ j
' 4qhbvgf—uq1igwgm 2+4=Q7éfwi 2.3— 47/ _ :7) ———«—' ‘ ——.—...._. ' — 2 g/ESWHZ'EI+i.2Clet TZEﬁlec—J—ZCEMP—L
“—“m"m 2 _. 23f: ..
WAKE—yaw :. «.__ . 20w: _. W @ F 8.9—1 Figure P 8.91 shows the transient response of a ﬁrst
order circuit. This transient response was obtained usingr the
‘ computer program PSpice. A point on this transient response .has been labeled. The label indicates a time and the capacitor voltage at that time. Placing the circuit diagram on the plot sug gests that the plot corresponds to the circuit Verify that the plot , _, , . _
does indeed represent the voltage of the capacitorinthis circuit. ' ' " A ‘ * ___ “WM”W" ‘ M "" " " ' __. ' 8.0 V 2kﬂ  +
E V 0.5 ,LLF unit) new) =_8 volts 7.0V 6.0 'v' 5.0 V (1.3333m, 4.5398) 05 1.0ms 2.0ms 3.0ms 4.0ms 5.0ms '
Time 17161112331389] Elmomail Jmﬁkﬁﬁﬁﬂn i5 m 22% mwﬁtwhajjﬁhiﬁm
W him 7964M 8V. +0 1H1. WEE": Meters—37”,.
with its. Usi; 93:90ij Samﬂ th't” ‘B‘Iﬁ WW VH7) "if"; S3338— __..,, _
i Smog Mathias? Valnw “W Value ohm )3!me 
i £5 Tic; Piﬁfw )1 Cmfred ‘ ‘
—r+
. . g‘ft :‘.
414
H' i DP 81 Design the circuit in Figure DP 81 50 that v(t) makes
the transition from v(t)=6V to 12(1): 10V in 10ms after the
i switch is closed. Assume that the circuit is at steady state he
! fore the switch is closed, Also assume that the transition Will be
1 complete after 5 time constants. i I i  I W__ W.____;2 ____
___33_..___ 7:. 764FMB_NW%M Metals J:__. W 1,... _.... _... _.... ...,. rf‘g‘s‘rssgftgf—TT — in
u; i ' ” The witch in the circuit in Fig. P7.15 has been in
_ ' __ position 1 for along time. A1: = 0, the switch moves
f? { instantaneously to position 2. Find 000‘) for r a 0+. 20f] .: TEPE WWW._%___i2_4:s.li.2_o_ ______ .._ _u_".__ uwm______ r__%V._._'_%__.____—_a.éf_vr_2,_w____ﬁ ...
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 Spring '09
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