AN3213 datasheet(26/64 Pages) STMICROELECTRONICS

Part #	AN3213

Description	ST7570 S-FSK power line networking system-on-chip

PDF	64 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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26 / 64 page

ST7570 demonstration board description

AN3213

26/64

Doc ID 17429 Rev 1

7.1

Line coupling section

The line coupling section is composed of four different circuits; the transmission active filter,

the reception passive filter, the power line coupling, and the zero crossing coupling. All four

sections are described below. For each section, calculations and measured behavior are

reported. The frequency response of the filters is usually sensitive to the component value

tolerance. Actual components used in the ST7570 demonstration board have the following

tolerances: +/-10 % for coils and for the Y2 capacitor, +/-1 % for SMD resistors, and +/-5 %

for SMD ceramic capacitors. To evaluate the sensitivity to these possible variations,

simulated responses are also included with Montecarlo statistical analysis of response

variation vs. spread of component value.

Figure 16.

Reception and transmission filter schematics

AN3213 Datasheet(PDF) 26 Page - STMicroelectronics