# Engineering Specification

Document source : www.fordemc.com

 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 All Pages

Engineering Specification
ES-3U5T-1B257-AA
EMC Design Guide for Printed Circuit Boards
Frame 35 of 78
Rev. A
10/01/2002
Printed copies are uncontrolled
0
0.1
0.2
0.3
0.4
0.5
0.1
1
10
100
h/d
L
gr
(microhenrys/foot)
Figure 3­14. Mutual Inductance Between Two Wires
Equation 3­15 gives induced noise voltage from inductive coupling:
dt
di
L
N
g
gr
noise
×
=
Equation 3­15. Noise voltage due to inductive coupling
Where,
dt
di
g
is the rate of change of the generator current
Therefore, fast changing generator currents will induce larger noise voltages in
receptor circuits.
Equation 3­16 also gives the noise voltage due to inductive coupling:
cos
BA
j
V
n
×
=
Equation 3­16. Noise voltage due to inductive coupling
Where, B is the magnetic flux density (weber/cm
2
)
A is the receptor circuit area (cm
2
)
is the angle between the generator and receptor circuit

 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 All Pages

Summary :

## Noise voltage due to inductive coupling Where, dt di g is the rate of change of the generator current Therefore, fast changing generator currents will induce larger noise voltages in receptor circuits.

Tags : noise,coupling,oltage,equation,inductie,receptor,due,circuit,generator,gies,printed,3­15,between
Related Documents

 Terms    |    Link pdf-search-files.com    |    Site Map    |    Contact    All books are the property of their respective owners. Please respect the publisher and the author for their creations if their books copyrighted © 2009 pdf-search-files.com