AN2744
Board description
23/56
Simulations of the filter for both frequency channels, given in
and
, show
limited effect by the components' tolerance.
Figure 11.
Measured frequency response of the Tx passive filter for 86 kHz channel (typical)
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
1E+04
1E+05
1E+06
Freq (Hz)
Gain
(
d
B)
CISPR
5
Ω
load
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
1E+04
1E+05
1E+06
Freq (Hz)
Gain
(
d
B)
CISPR
5
Ω
load
Figure 12.
Simulated frequency response of the Tx passive filter for 72 kHz channel with
tolerance effect
1E5
1E4
1E6
-35
-30
-25
-20
-15
-10
-5
0
5
-40
10
Summary of Contents for ST7538Q
Page 3: ...AN2744 Contents 3 56 Appendix A Board layout 53 10 Revision history 55...
Page 15: ...AN2744 Board description 15 56 Figure 7 Modem and coupling interface schematic...
Page 16: ...Board description AN2744 16 56 Figure 8 Power supply schematic HIGH VOLTAGE SECTION...
Page 53: ...AN2744 Board layout 53 56 Appendix A Board layout Figure 50 PCB layout top view...
Page 54: ...Board layout AN2744 54 56 Figure 51 PCB layout bottom view...
