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參數(shù)資料
| 型號(hào)： | LMX2315 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Frequency Synthesizer for RF Personal Communications |
| 中文描述： | 頻率合成射頻個(gè)人通信 |
| 文件頁(yè)數(shù)： | 13/22頁(yè) |
| 文件大?。?/td> | 409K |
| 代理商： | LMX2315 |
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Analog Switch
The analog switch is useful for radio systems that utilize a frequency scanning mode and a narrow band mode. The purpose of
the analog switch is to decrease the loop filter time constant, allowing the VCO to adjust to its new frequency in a shorter
amount of time. This is achieved by adding another filter stage in parallel. The output of the charge pump is normally through the
D
o
pin, but when LE is set HIGH, the charge pump output also becomes available at BISW. A typical circuit is shown below. The
second filter stage (LPF-2) is effective only when the switch is closed (in the scanning mode).
TL/W/12339–24
Typical Crystal Oscillator Circuit
A typical circuit which can be used to implement a crystal
oscillator is shown below.
TL/W/12339–52
Typical Lock Detect Circuit
A lock detect circuit is needed in order to provide a steady
LOW signal when the PLL is in the locked state. A typical
circuit is shown below.
TL/W/12339–26
http://www.national.com
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2315TM | Frequency Synthesizer for RF Personal Communications |
| LMX2315TMX | Frequency Synthesizer for RF Personal Communications |
| LMX2316 | PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316TMX | PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316TM | PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2315D WAF | 制造商:Texas Instruments 功能描述: |
| LMX2315TM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.2 GHz Frequency Synthesizer for RF Personal Communications |
| LMX2315TMX | 功能描述:IC FREQ SYNTH 2.5GHZ 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時(shí)鐘 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:* |
| LMX2316 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316LBX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FREQUENCY SYNTHESIZER|BICMOS|LLCC|16PIN|PLASTIC |
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