100

10

0.0001

0.001

0.01

res e t va lue

be ta_tmg

9

1

1

0.1

VCO Re lative Fre quency Ra nge (

∆f)

8

7

6

5

4

3

2

Figure 1 : Natural Frequency for Fs = 20MBauds

Example :

the VCO is trimmed from 39.9MHz to 40.1MHz when the VCO control output CLKREC goes from duty

cycle 0 to 100%. The peak-to-peak relative range is therefore 0.5% and

∆f = 0.0025 ; the reset values of

the parameters (alpha_tmg = 4, beta_tmg = 5) leads to a natural frequency of 2.6kHz, with a damping

factor of 0.84.

10

1

0.1

0.0001

0.001

0.01

re se t value

VCO Relative Frequency Ra nge (

∆f)

2alpha_tmg

- beta _tmg

8

7

6

5

4

3

2

1

0

Figure 2 : Damping Factor

FUNCTIONAL DESCRIPTION (continued)

STV0196B

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