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參數(shù)資料
| 型號(hào)： | ZL20200LDF1 |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | Dual Band IS136/AMPS Transceiver |
| 中文描述： | 雙頻IS136/AMPS收發(fā)器 |
| 文件頁數(shù)： | 12/51頁 |
| 文件大?。?/td> | 485K |
| 代理商： | ZL20200LDF1 |
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ZL20200
Data Sheet
12
Zarlink Semiconductor Inc.
A RSSI output is provided. This is a full wave rectified output of the 60 kHz IF and therefore has a high 120 kHz
content. This requires an external low pass filter - typically 10 kohm and 2.7 nF. There is a trade-off between
settling time and filtering. This is different to conventional RSSI circuits which operate at typically 450 kHz which is
much easier to filter.
Although the AMPS receive path includes a limiting amplifier, gain control is also required. This is because the band
pass filter has limited dynamic range (50 dB). At low signal levels the agc should be set to 1.6 volts to set the gain
20 dB below maximum to obtain optimum signal handling and noise performance. At higher signal levels the gain
setting should be reduced to maintain the RSSI level approximately 10 dB below maximum. Gain control would be
provided by the baseband controller which would also monitor the RSSi level. Fine gain control is not required and
can be implemented in large steps e.g. 20 dB, allowing the use of a relatively slow gain control loop giving optimum
performance under fading conditions.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ZL20200LDG | Dual Band IS136/AMPS Transceiver |
| ZL20200LDG1 | Dual Band IS136/AMPS Transceiver |
| ZL20200 | Dual Band IS136/AMPS Transceiver |
| ZL20200LCE | Dual Band IS136/AMPS Transceiver |
| ZL20200LCF | Dual Band IS136/AMPS Transceiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZL20200LDG | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Dual Band IS136/AMPS Transceiver |
| ZL20200LDG1 | 制造商:Microsemi Corporation 功能描述: |
| ZL20250 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:2.5G Multimode Transceiver |
| ZL20250/LCE | 制造商:Microsemi Corporation 功能描述:RF TRNSCVR FM 56QFN - Bulk |
| ZL20250/LCF | 制造商:Microsemi Corporation 功能描述:RF TRNSCVR FM 56QFN - Bulk |
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