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參數(shù)資料
| 型號： | LMX9830 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | BluetoothTM Serial Port Module |
| 中文描述： | 藍(lán)牙串口模塊 |
| 文件頁數(shù)： | 25/46頁 |
| 文件大小： | 664K |
| 代理商： | LMX9830 |
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9.0 Digital Smart Radio
(Continued)
Figure 17. ESR vs. Load capacitance for the crystal circuit
9.8 ANTENNA MATCHING AND FRONT-END FIL-
TERING
Figure 18 shows the recommended component layout to
be used between RF output and antenna input. Allows for
versatility in the design such that the match to the antenna
maybe improved and/or the blocking margin increased by
addition of a LC filter. Refer to antenna application note for
further details.
Figure 18. Front end Layout
9.9 LOOP FILTER DESIGN
The LMX9830 has an external loop filter which must be
designed for best performance by the end customer. This
section therefore gives some foresight into its design. Refer
also to Loop Filter application note and National’s
Webench on-line design tool for more information.
9.9.1 Component Calculations
The following parameters are required for component value
calculation of a third order passive loop filter.
LC filter
PI Match
To Antenna
Phase Margin: Phase of the open loop
transfer function
Loop Bandwidth
F
c
F
comp
Comparison Frequency: Phase detector
frequency
VCO gain: Sensitivity of the VCO to control
volts
Charge Pump gain: Magnitude of the
alternating current during lock
Maximum RF output frequency
KVOC
K
F
OUT
T31
Ratio of the poles T3 to T1 in a 3
rd
order
filter
Gamma optimization parameter
φ
Φ
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX9830SM | BluetoothTM Serial Port Module |
| LMX9830SMX | BluetoothTM Serial Port Module |
| LMX9838 | Bluetooth Serial Port Module |
| LMX9838SB | Bluetooth Serial Port Module |
| LMX9838SBX | Bluetooth Serial Port Module |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX9830DONGLE | 功能描述:藍(lán)牙/802.15.1 開發(fā)工具 LMX9830 BLUETOOTH EVAL KIT RoHS:否 制造商:Panasonic Electronic Components 產(chǎn)品:Bluetooth Evaluation Kit 工具用于評估:PAN1721 頻率:2.4 GHz 接口類型:I2C 工作電源電壓:2 V to 3.6 V |
| LMX9830DONGLE/NOPB | 制造商:Texas Instruments 功能描述:Evaluation Kit For Bluetooth Serial Port Module |
| LMX9830SM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:BluetoothTM Serial Port Module |
| LMX9830SM/NOPB | 功能描述:射頻收發(fā)器 RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
| LMX9830SMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:BluetoothTM Serial Port Module |
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