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CLRC63201T/0FE bảng dữ liệu(PDF) 99 Page - NXP Semiconductors |
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CLRC63201T/0FE bảng dữ liệu(HTML) 99 Page - NXP Semiconductors |
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99 / 163 page ![]() Philips Semiconductors Product Specification Rev. 3.0; May 2003 Multiple Protocol Contactless Reader IC CL RC632 99 Confidential 13.2 Operating Distance versus Power Consumption The user has the possibility to find a trade-off between maximum achievable operating distance and power consumption using different antenna matching circuits by varying the supply voltage at the antenna driver supply pin TVDD. Different antenna matching circuits are described in the Application Note, MIFARE Design of MF RC500 Matching Circuit and Antennas. 13.3 Antenna Driver Output Source Resistance The output source conductance of TX1 and TX2 for driving a HIGH level may be adjusted via the value GsCfgCW in the CwConductance Register in the range from about 1 up to 100 Ohm. The output source conductance of Tx1 and TX2 during the modulation phase may be adjusted via the value GsCfgMod in the ModConductance Register in the same range. The values given are relative to the reference resistance Rsrel, that is measured during production test and stored in the CL RC632 E²PROM. It can be obtained from the Product Information Field (see chapter 6.2). The electrical specification can be found in chapter 22.4.3. |
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