Crosstalk minimization in PCB Design - Cell-by-Cell Formula Trace

Sample Data

This data shows PCB trace lengths, spacing between traces, and their coupling capacitance which affects crosstalk voltage.

Cell	Value
A1	Trace Length (mm)
B1	Spacing (mm)
C1	Coupling Capacitance (pF)
D1	Crosstalk Voltage (mV)
A2	50
B2	0.2
C2	1.5
D2
A3	50
B3	0.5
C3	0.6
D3
A4	50
B4	1.0
C4	0.3
D4

Formula Trace

=C2 * 100

Step 1: C2

Step 2: 1.5 * 100

Cell Reference Map

    A       B       C       D
1 | Trace | Spacing | Coupling | Crosstalk
  | Length|         | Capacit. | Voltage
-----------------------------------------
2 |  50   |  0.2    |  1.5     |  =C2*100
3 |  50   |  0.5    |  0.6     |  
4 |  50   |  1.0    |  0.3     |  

Formula references coupling capacitance in cell C2 to calculate crosstalk voltage in D2.

Result

    A       B       C       D
1 | Trace | Spacing | Coupling | Crosstalk
  | Length|         | Capacit. | Voltage
-----------------------------------------
2 |  50   |  0.2    |  1.5     |  150
3 |  50   |  0.5    |  0.6     |  
4 |  50   |  1.0    |  0.3     |  

The crosstalk voltage in cell D2 is calculated as 150 mV by multiplying coupling capacitance 1.5 pF by 100.

Sheet Trace Quiz - 3 Questions

What value does the formula use from the sheet to calculate crosstalk voltage?

A Coupling capacitance in C2

B Trace length in A2

C Spacing in B2

D Crosstalk voltage in D2

Key Result

Multiply coupling capacitance by a constant factor to estimate crosstalk voltage.