參數(shù)資料
型號(hào): 935044170112
廠商: NXP SEMICONDUCTORS
元件分類: PLL合成/DDS/VCOs
英文描述: PHASE LOCKED LOOP, PDIP16
封裝: 0.300 INCH, PLASTIC, SOT-38, DIP-16
文件頁數(shù): 3/40頁
文件大?。?/td> 240K
代理商: 935044170112
1999 Jan 11
11
Philips Semiconductors
Product specication
PLL with bandgap controlled VCO
74HCT9046A
MBD047 - 1
SIG IN
COMPIN
VCO OUT
high impedance OFF state,
(zero current)
UP
DOWN
CURRENT AT
PC2 OUT
PC2
/VCO
OUT
IN
PCPOUT
OPC IN
Fig.10 Timing diagram for PC2.
The pulse overlap of the up and down signals (typically 15 ns).
Fig.11 The response of a locked-loop in the vicinity of the zero crossing of the phase error.
b. Response with current switch charge-pump PC2OUT as applied in the HCT9046A.
MBD043
25
2.50
2.75
2.25
VCO IN
025
phase error (ns)
(1)
(2)
25
2.50
2.75
2.25
VCO IN
025
phase error (ns)
a. Response with traditional voltage-switch charge-pump PC2OUT (4046A).
(1) Due to parasitic capacitance on PC2OUT.
(2) Backlash time (dead zone).
b.
a.
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