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ICS9214

Rambus™ XDR™ Clock Generator

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

ICS9214

Phase Noise

The 9214 meets the single side band phase noise spectral purity for offset frequencies between 1 MHz and 100 MHz as

described by the equation:

10log[1+(50 x 106/f)2.4] -138 dBc/Hz

This equation is shown in Figure 9. Phase Noise Plot

-100

-110

-120

-130

-140

-150

10 6

10 log[1 + ( 50x 106/ f )2.4] -138

( Upper Lim it )

1 07

10 8

Offs et Freq u e ncy f , H z

10 9

Figure 9 : Phase Noise Plot

Sample points are for this equation are shown in Table 6. Phase Noise Data Points

Offset

Frequency

1

(MHz)

SSB Spectral

Purity

-97

(dbc/Hz)

5

10

15

20

40

80

100

-114

-121

-125.2 -128 -133.7 -136.8 -137.3

Table 6 : Phase Noise Data Points

0809D—04/07/06

14

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