AN4444 datasheet(33/68 Pages) STMICROELECTRONICS

Il numero della parte	AN4444

Spiegazioni elettronici	ST7590 PRIME compliant power line networking SoC design guide

PDF	68 Pages

Scroll/Zoom	100%

Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

Logo

33 / 68 page

DocID025925 Rev 2

33/68

AN4444

ST7590 reference design description

Reception optional amplifier

An additional all-pass amplifier has been included as an option to extend the dynamic range

of the communication.

The gain of the external amplifier only (to be combined with the reception passive filter

response) can be calculated as:

Equation 7

This extra gain could lead to ST7590 Rx input stage saturation if the input signal is very

strong. In that case, an automatic algorithm has been implemented to attenuate the input

signal. This attenuation can be calculated as:

Equation 8

Figure 22 and Figure 23 report the measured frequency response in amplification and

attenuation cases, compared with the passive filter response. Figure 24 and Figure 25 show

the result of Montecarlo simulation for the same cases.

Figure 22. Measured frequency response of the reception external amplifier + passive filter

(higher curve) vs. reception passive filter only (lower curve)

10.9

3.5



















AN4444 Scheda tecnica(PDF) 33 Page - STMicroelectronics