FS6131 Ver la hoja de datos (PDF) - ON Semiconductor

Número de pieza

componentes Descripción

Fabricante

FS6131

Programmable Line Lock Clock Generator IC

ON Semiconductor 

FS6131

-100°

-150°

0.1kHz

1kHz

10kHz

Frequency (fi)

Figure 9: Loop Nyquist Plot

A Nyquist plot of gain vs. amplitude is shown below.

100kHz

90°

1.2

1.0

135°

0.8

Amplitude

0.6

0.4

0.2

Gain Margin

180°

Phase

Margin

225°

270°

Phase

Figure 10: Loop Nyquist Plot

45°

0°

315°

4.4 Voltage-Controlled Crystal Oscillator

The VCXO provides a tunable, low-jitter frequency reference for the rest of the FS6131 system components. Loading capacitance for

the crystal is internal to the device. No external components (other than the resonator itself) are required for operation of the VCXO.

The resonator loading capacitance is adjustable under register control. This feature permits factory coarse tuning of inexpensive

resonators to the necessary precision for digital video applications. Continuous fine-tuning of the VCXO frequency is accomplished by

Rev. 4 | Page 9 of 44 | www.onsemi.com

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