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**Unformatted text preview: **13.48 a) Find the transfer function H (s) = VO/Vi for the
PSPICE circuit shown in Fig. P13.48(a). III yum-vu- Figure P13.48 13.49 a) Find the transfer function H (S) = VO/Vl- for the
circuit shown in Fig. P13.49(a). b) Find the transfer function H (S) = Vo/Vl- for the
circuit shown in Fig. P13.49(b). Figure P13.49 13.52 Find the numerical expression for the transfer func- PSPICE tion (Va/Vi) of each circuit in Fig. P13.52 and give ”mg“ the numerical value of the poles and zeros of each
transfer function. Figure P13.52
2 k0 + l +
v,- 20 MFI 120 (a) 13.78 The transfer function for a linear time-invariant
circuit is
V0 25(s + 8) Hs =—=—.
() Vg sz+60s+150 If vg = 10 cos 20t V, what is the steady-state
expression for v0? 13.83 There is no energy stored in the circuit in Fig. P13.83
at the time the impulsive voltage is applied. a) Find v0(t) fort 2 0. b) Does your solution make sense in terms of
known circuit behavior? Explain. Figure P13.83
1 k!) 80 mH +
320 mH ’00 0 wow 13.86 The parallel combination of R2 and C 2 in the circuit
shown in Fig. P13.86 represents the input circuit to a
cathode-ray oscilloscope (CRO). The parallel combi-
nation of R1 and C1 is a circuit model of a compensat-
ing lead that is used to connect the CRO to the source.
There is no energy stored in C1 or C 2 at the time when
the 10 V source is connected to the CRO Via the com- pensating lead. The circuit values are C1 = 4 pF,
C2 = 16 pF,R1 = 1.25 MQ,and R2 = 5 MS). a) Find v0.
b) Find i0.
c) Repeat (a) and (b) given C1 is changed to 64 pF. Figure P13.86 ...

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- Fall '09
- Trigraph, LTI system theory