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参数资料
| 型号： | LMX2301MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 160 MHz, UUC |
| 封装： | DIE |
| 文件页数： | 17/17页 |
| 文件大小： | 233K |
| 代理商： | LMX2301MDC |
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
Do 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)
TLW12458 – 19
Typical Crystal Oscillator Circuit
A typical circuit which can be used to implement a crystal
oscillator is shown below
TLW12458 – 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
TLW12458 – 21
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMX2301TM | 制造商:Texas Instruments 功能描述: |
| LMX2301TMX | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinumTM 160 MHz Frequency Synthesizer for RF Personal Communications |
| LMX2305 | 制造商:NSC 制造商全称: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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