Digital Signal Processing Reference
In-Depth Information
9.5
Use the inductance and capacitance matrix from Problem 9.3 to find the
two worst-case propagation times.
9.6
Does the matrix in Problem 9.3 represent a microstrip or stripline?
9.7
A field solver produced the following output file for a two-trace system. Is
this the matrix for a stripline or microstrip?
L MATRIX [H/INCH]
1.052e-8
2.040e-9
2.040e-9
1.052e-8
C MATRIX [F/INCH]
2.835e-12
−
5.490e-13
−
5.490e-13
2.835e-12
9.8 Compare the results from (9.5) and (9.7) with (7.5) for the two-trace system
given in Problem 9.7. Assume that the dielectric constant is 4.0.
9.9 Use the matrices in Problem 9.3 to show how the coupling falls as the dis-
tance from a given trace increases. Also show that the traces are symmetrical.
9.10 What voltage will be launched down the transmission line described by the
matrix appearing in Problem 9.7, assuming that the ASIC I/O driver has an
output impedance of 25
and is connected to a 2.5-V supply? How does
the voltage change when the driver impedance is reduced to 10
Ω
?
9.11 Use the matrices in Problem 9.7 to show that incorrect results are obtained
when negative values are used for mutual capacitance when calculating the
even- and odd-mode delays and impedances.
Ω
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