GS9075BCNE3 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
Manufacturer
GS9075BCNE3 Datasheet PDF : 28 Pages
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4. Detailed Description
The GS1575B/9075B is a Multi-Rate Serial Digital Reclocker designed to automatically
recover the embedded clock from a digital video signal and re-time the incoming video
data.
The GS1575B will recover the embedded clock signal and re-time the data from a SMPTE
292M, SMPTE 259M or SMPTE 344M compliant digital video signal.
The GS9075B will recover the embedded clock signal and re-time the data from a SMPTE
259M or SMPTE 344M compliant digital video signal.
Using the functional block diagram (page 2) as a guide, Slew Rate Phase Lock Loop
(S-PLL) on page 16 to Output Mute on page 22 describes each aspect of the
GS1575B/9075B in detail.
4.1 Slew Rate Phase Lock Loop (S-PLL)
The term “slew” refers to the output phase of the PLL in response to a step change at the
input. Linear PLLs have an output phase response characterized by an exponential
response whereas an S-PLL’s output is a ramp response (see Figure 4-1). Because of this
non-linear response characteristic, traditional small signal analysis is not possible with
an S-PLL.
0.2
INPUT
0.1
OUTPUT
0.0
SLEW PLL RESPONSE
0.2
INPUT
0.1
OUTPUT
0.0
LINEAR (CONVENTIONAL) PLL RESPONSE
Figure 4-1: PLL Characteristics
GS1575B / GS9075B HD-LINX® II Multi-Rate SDI
Automatic Reclocker
Data Sheet
40063 - 1
June 2009
16 of 28
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