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參數資料
| 型號： | LMX2301 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinumTM 160 MHz Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLLatinumTM 160兆赫頻率合成射頻個人通信 |
| 文件頁數： | 9/14頁 |
| 文件大小： | 225K |
| 代理商： | LMX2301 |
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/12458–19
Typical Crystal Oscillator Circuit
A typical circuit which can be used to implement a crystal
oscillator is shown below.
TL/W/12458–20
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/12458–21
http://www.national.com
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相關PDF資料 |
PDF描述 |
|---|---|
| LMX2301TM | PLLatinumTM 160 MHz Frequency Synthesizer for RF Personal Communications |
| LMX2301TMX | PLLatinumTM 160 MHz Frequency Synthesizer for RF Personal Communications |
| LMX2305TM | PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Communications |
| LMX2305TMX | PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Communications |
| LMX2305 | PLLatinum 550 MHz Frequency Synthesizer for RF Personal Communications(PLLatinum技術用于射頻個人通訊的550MHZ頻率合成器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LMX2301TM | 制造商:Texas Instruments 功能描述: |
| LMX2301TMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinumTM 160 MHz Frequency Synthesizer for RF Personal Communications |
| LMX2305 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Communications |
| LMX2305 WAF | 制造商:Texas Instruments 功能描述: |
| LMX2305C WAF | 制造商:Texas Instruments 功能描述: |
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