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参数资料
| 型号： | CD4046BC |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | Micropower Phase-Locked Loop |
| 中文描述： | 微锁相环 |
| 文件页数： | 3/14页 |
| 文件大小： | 310K |
| 代理商： | CD4046BC |
Design Information
This information is a guide for approximating the value of
external components for the CD4046B in a phase-locked-
loop system The selected external components must be
within the following ranges R1 R2 t 10 kX RS t 10 kX
C1 t 50 pF
In addition to the given design information refer to
Figure 5
for R1 R2 and C1 component selections
Using Phase Comparator I
Using Phase Comparator II
Characteristics
VCO Without Offset
VCO With Offset
VCO Without Offset
VCO With Offset
R2 e %
VCO Frequency
For No Signal Input
VCO in PLL system will adjust
VCO in PLL system will adjust to
to center frequency fo
lowest operating frequency fmin
Frequency Lock
2 fL e full VCO frequency range
Range 2 fL
2fL e fmax b fmin
Frequency Capture
Range 2 fC
2fC
1
q
02
q fL
u1
Loop Filter
fC e fL
Component
Selection
For 2 fC see Ref
Phase Angle Between
90 at center frequency (fo) approximating
Always 0 in lock
Single and Comparator
0 and 180 at ends of lock range (2 fL)
Locks on Harmonics
Yes
No
of Center Frequency
Signal Input Noise
High
Low
Rejection
VCO Component
Given fo
Given fo and fL
Given fmax
Given fmin and fmax
Selection
Use fo with
Calculate fmin
Calculate fo from
Use fmin with
Figure 5a to
from the equation
the equation
Figure 5b to
determine R1
determine R2 and C1
fmin e fo b fL
and C1
fo e
fmax
2
Use fmin with Figure 5b
Calculate
fmax
fmin
to determine R2 and C1
Use fo with Figure 5a to
determine R1 and C1
Use
fmax
fmin
with
Figure 5c
Calculate
fmax
fmin
to determine ratio
from the equation
R2R1 to obtain R1
fmax
fmin
e
fo a fL
fo b fL
Use
fmax
fmin
with
Figure 5c
to determine ratio R2
R1 to obtain R1
TLF5968 – 7
TLF5968 – 9
TLF5968 – 10
TLF5968 – 8
TLF5968 – 11
TLF5968 – 12
References
GS Moschytz ‘‘Miniaturized RC Filters Using Phase-Locked Loop’’ BSTJ May 1965
Floyd Gardner ‘‘Phaselock Techniques’’ John Wiley
Sons 1966
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CD4046BCM | 功能描述:锁相环 - PLL Phase-Locked Loop RoHS:否 制造商:Silicon Labs 类型:PLL Clock Multiplier 电路数量:1 最大输入频率:710 MHz 最小输入频率:0.002 MHz 输出频率范围:0.002 MHz to 808 MHz 电源电压-最大:3.63 V 电源电压-最小:1.71 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:QFN-36 封装:Tray |
| CD4046BCMX | 制造商:Fairchild Semiconductor Corporation 功能描述:PLL Single 0.8MHz to 1.6MHz 16-Pin SOIC N T/R |
| CD4046BCN | 功能描述:锁相环 - PLL Phase-Locked Loop RoHS:否 制造商:Silicon Labs 类型:PLL Clock Multiplier 电路数量:1 最大输入频率:710 MHz 最小输入频率:0.002 MHz 输出频率范围:0.002 MHz to 808 MHz 电源电压-最大:3.63 V 电源电压-最小:1.71 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:QFN-36 封装:Tray |
| CD4046BE | 功能描述:锁相环 - PLL Micropower PLL RoHS:否 制造商:Silicon Labs 类型:PLL Clock Multiplier 电路数量:1 最大输入频率:710 MHz 最小输入频率:0.002 MHz 输出频率范围:0.002 MHz to 808 MHz 电源电压-最大:3.63 V 电源电压-最小:1.71 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:QFN-36 封装:Tray |
| CD4046BE | 制造商:Texas Instruments 功能描述:Micropower phase locked loop CMOS famil |
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