THS6092SLASH3 datasheet(20/46 Pages) TI1

tên linh kiện	THS6092/3

Giải thích chi tiết về linh kiện	350mA,12V ADSL CPE LINE DRIVERS

PDF	46 Pages

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nhà sản xuất	TI1 [Texas Instruments]

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THS6042, THS6043

350 mA, ±12 V ADSL CPE LINE DRIVERS

SLOS264G − MARCH 2000 − REVISED DECEMBER 2001

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

APPLICATION INFORMATION

noise calculations and noise figure (continued)

This brings up another noise measurement usually preferred in RF applications, the noise figure (NF). Noise

figure is a measure of noise degradation caused by the amplifier. The value of the source resistance must be

defined and is typically 50

Ω in RF applications.

+ 10log

Because the dominant noise components are generally the source resistance and the internal amplifier noise

voltage, we can approximate noise figure as:

+ 10log 1 )

) IN )

4kTR

Figure 39 shows the noise figure graph for the THS6042/3.

100

1 k

10 k

RS − Source Resistance − Ω

f = 10 kHz

TA = 25°C

Figure 39. Noise Figure vs Source Resistance

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