參數(shù)資料
型號(hào): KB2514
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: VIDEO AMP MERGED OSD PROCESSOR FOR MONITORS
中文描述: 視頻放大器合并OSD處理器的顯示器
文件頁(yè)數(shù): 44/55頁(yè)
文件大?。?/td> 563K
代理商: KB2514
VIDEO AMP MERGED OSD PROCESSOR FOR MONITORS
KB2514
43
Preliminary
PLL of the KB2514
PLL is composed of the phase detector, charge pump, VCO, and N-divider as 4 sub-blocks.
The following is the description of the input/output signals.
-
HFLB (Input)
Horizontal flyback signal is refrence signal of the PLL built in KB2514.
The HFLB signal's frequency range is 15 ~ 90kHz, so the PLL block must be a wide range PLL that can cover
HFLB's entire frequency range.
- VCO (Input)
Error signal that passes through an external loop filter is input into VCO.
Operation voltage range is 1-4V. You can raise immunity towards external noise by lowering VCO
sensitivity. You can do this by making it have the maximum operation voltage range possible in the 5V power
voltage.
Figure 18. Block Diagram of the PLL Built in KB2514
Phase
Detector
Charge
Pump
VCO
N-Divider
Loop
Filter
VCO_in
(Pin3)
Div_out
HFLB (Pin32)
CP_out
(Pin4)
VCO_out
CP0
CP1
DOT0
DOT1
HF0 HF1 HF2
# Composed of External Components
fHFLB
< 0. 4V
> 4. 2V
~2us
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