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參數(shù)資料
| 型號： | STW81100AT |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | MULTI-BAND RF FREQUENCY SYNTHESIZER WITH INTEGRATED VCOS |
| 中文描述： | 多波段射頻頻率合成器帶有集成的VCO |
| 文件頁數(shù)： | 11/23頁 |
| 文件大?。?/td> | 915K |
| 代理商： | STW81100AT |
11/23
STW81100
where:
– FVCO: output frequency of VCO.
– P: modulus of dual modulus prescaler.
– B: division ratio of the main counter.
– A: division ratio of the swallow counter.
– Fref: input reference frequency.
– R: division ratio of reference counter.
– N: division ratio of PLL
For a correct work of the VCO divider, B must be strictly higher than A. A can take any value ranging from
0 to 63. The range of the N number can vary from 4096 to 32767.
Figure 13. VCO Divider Diagram
7.5 Phase frequency detector (PFD)
The PFD takes inputs from the reference and the VCO dividers and produces an output proportional to
the phase error. The PFD includes a delay gate that controls the width of the anti-backlash pulse. This
pulse ensures that there is no dead zone in the PFD transfer function.
Figure 6 is a simplified schematic of the PFD.
Figure 14. PDF Diagram
64/65
6 bit
A counter
9bit
B counter
To PFD
modulus
VCOBUF+
VCOBUF-
Prescaler
D FF
R
Fref
VDD
R
D FF
Fref
VDD
Delay
Up
Down
ABL
相關(guān)PDF資料 |
PDF描述 |
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| STW81100 | MULTI-BAND RF FREQUENCY SYNTHESIZER WITH INTEGRATED VCOS |
| STW81100ATR | MULTI-BAND RF FREQUENCY SYNTHESIZER WITH INTEGRATED VCOS |
| STY140NS10 | CAP 0.22UF 100V 10% X7R AXIAL TR-14 |
| STY16NA90 | N-Channel 900V-0.5Ω-16A- Max247 Extremely Low Gate Charge Power MOSFET(N溝道功率MOSFET) |
| STY34NB50 | N-Channel 500V-0.11Ω-34A- Max247 PowerMESHTM MOSFET(N溝道MOSFET) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STW81100AT-1 | 功能描述:鎖相環(huán) - PLL MULTI BAND RF FREQ SYNTHESIZER RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| STW81100ATR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MULTI-BAND RF FREQUENCY SYNTHESIZER WITH INTEGRATED VCOS |
| STW81100ATR-1 | 功能描述:鎖相環(huán) - PLL MULTI BAND RF FREQ SYNTHESIZER RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| STW81101 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Multi-band RF frequency synthesizer with integrated VCOs |
| STW81101_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Multi-band RF frequency synthesizer with integrated VCOs |
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