0195136047.pdf

PROBLEMS 195

L = 1 H

iL(0) = 0

R = 300 Ω

vs = 10 sin 300 t i(t)

+

−

Figure P3.5.4

C = 5 μF vC(t); vC(0) = 0

t = 0 L^ = 2 mH R

vs = 50 V ii(0) (t)= 0

+

−

+

−

Figure P3.5.5

2000 μF

2 sin(100t) 10 Ω 0.1 H 1.5 cos(100t)

O

12 Figure P3.5.6

100 Ω vR

vL

vC

0.2 μF

50 mH

vs(t) = 10 cos(10^4 t) i

+

−

+

+−

− +

−

Figure P3.5.7

v 2 (t) = 100 cos(100t + 30 °)

100 Ω 0.5 H

vR vL

v 1 (t) = 100 sin(100t)

i(t)

+

−

+

+−+ −

−

Figure P3.5.8

3.5.7For the circuit shown in Figure P3.5.7, find the

phasor values (with peak magnitudes) ofI, ̄V ̄R,

V ̄L,andV ̄Cby using PSpice.

*3.5.8Use PSpice to find the phasorI ̄(with peak mag-
nitude) for the circuit shown in Figure P3.5.8.
3.5.9A low-pass filter circuit is shown in Figure P3.5.9.

Using a PSpice program and PROBE, obtain the

Bode magnitude plot for the transfer function

H(f) ̄ =V ̄out/V ̄infor the frequency range of 10

Hz to 100 kHz. Determine the fall-off rate (in

dB/decade) of the magnitude at high frequencies,

and also the half-power frequency.