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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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SIM800L 데이터시트(PDF) 54 Page - SIMCom |
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SIM800L 데이터시트(HTML) 54 Page - SIMCom |
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54 / 73 page  Smart Machine Smart Decision The module provides 2 FM antenna pad named FM_ANTP and FM_ANTN, these are difference signal. The FM antenna interface circuit is recommended as following: Figure 52: FM antenna matching circuit Normally, R301\R302\R303\R304 are 0Ω, C301\C302\C303\C304 are not mounted. The earphone is often used for FM antenna, as an example, the pin GND of the 3.5mm earphone is connected to the FM interface. The circuit is recommended as following: Figure 53: GND pin of the earphone use to be the FM antenna interface Normally, R301\R303 are 0Ω, C301\C302\C303\C304\L301 are not mounted. SIM800H&SIM800L_Hardware Design_V2.02 54 2015-07-27 |
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