EE235 Errata
# Errata for Edition 4

p. 749, Appendix H, answer to Problem 6.3(a), the last term
2/(3pi) cos(150pi t) should be negative. 7/11/07
p. 750, Appendix H, answer to problem 6.8(a) should be L=11.3 mH and
C= 22.5 nF. 9/5/07
p. 394, Problem 7.17 (iii), the third term should be a first derivative, not a
second derivative. 9/6/07
p. 752, App H 7.7(b) should have a second term, 6e^{-2s}*1/s (the answer should be:)
3e^{-2s}{s^2}+6e^{-2s}{s}. 9/10/07
p. 434, 8.3(e), the second term in the first line should be 3 y_1(dot)(t), i.e. it should
be 3 times the first
derivative of y_1(t). 9/12/07
p. 80, Figure P2.4(b), the final sloping line in the signal
should slope down to x=4.5, not x=5. In other words, this piece should
go from (4,3) to (4.5,1.5), rather than to (5, 1.5) as is shown.
9/24/07
p. 81, Problem 2.11, Change the label of Figure P2.11 to be
x_o(t) instead of x_e(t). Also, change the second sentence to read,
"Complete the plots of x(t) and x_o(t)...." 9/24/07
p. 141, Figure P3.6, the second graph should be labeled h(t), not
x(t). 9/24/07
p. 194, 4.24(g), the "w=1" should be "T=1" 9/24/07
p. 196, 4.32, the "a" in the equation for h(t) should be alpha
9/24/07
p. 754, 8.24(a) should be 2(s^2 + s -1)/(s^3 + s^2 -s -1)
9/26/07
p. 754, 8.24(b). The 3X3 matrix should be [0 1 1; 0 -1 0; 1 0 0].
9/26/07
p. 754, 8.24(b). The last line should read y = [1 1 0] v_bar.
9/26/07
p. 55, Example 2.11, the third region should be 1 < t < 2, not
0 < t < 2. 10/8/07
p. 746, 3.21(b). The solution should be causal, not stable.
10/30/07
p. 150, under equation 4.1, two derivatives are listed. The
second of the two should have a double prime indicating a second
derivative. 11/9/07
Page 112, Example 3.10, for the s(t) equation, it should (before
entering the limits of integration) be (1/-3)e^-3(tau) evaluated from
0 to t. The typo is that s(t) is written as equaling
(1/-3)e^-3(t)...which is not correct because the integral was taken
with respect to tau. 11/11/07
page 748, Problem 5.6(a), the answer should be:
(A/2)/(B+j(w-w0)) + (A/2)/(B+j(w+w0)). 11/14/07
p. 329, problem 6.23. For clarity, write H(omega) =
rect (omega/omega_s) where omega_s = 3/2 omega_c. 12/8/07
p. 674, problem 12.2(a), the function should have been written
as x[n] = (.5)^n u[n], n>=0, and x[n]=0, n<0. 5/16/08
p. 95, halfway down the page, change "discrete" to "continuous" in
"The convolution integral signifies that the impulse response of an LTI discrete system, h(t),....."
9/20/2008
p. 224, change "If f(t) has a nonzero time-averaged value" to
"If f(t) has a nonzero time-integrated value" i.e. change "averaged" to "integrated. 11/26/08
p. 279, first line of page, omega_c > 800 pi ==> 800 pi < omega_c < 1200 pi.
11/26/08
p. 336
F(s)=int (f(t) e^-sigma t) e^-j omega dt ==> int (f(t) e^-sigma t) e^-j omega t dt,
i.e. insert a "t." 11/26/08
P. 238, Fig. 5.21, in the figure label, change the T in the summation delta (t- nT)
==> to T_s, so you get the summation delta (t- nT_s), i.e. insert the s subscript on T.
This will make the figure consistent with equation (5.39).
12/26/08
P. 239, Fig. 5.22 (a)
for the point t=2 T_s, change its y-value to f(2T_s). 12/26/08

This page is maintained by Eve Riskin (riskin@u.washington.edu).
Last updated on December 26, 2008.