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MC13150FTA bảng dữ liệu(PDF) 11 Page - LANSDALE Semiconductor Inc. |
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MC13150FTA bảng dữ liệu(HTML) 11 Page - LANSDALE Semiconductor Inc. |
11 / 20 page LANSDALE Semiconductor, Inc. ML13150 Figure 17. Signal Levels versus RF Input Signal Level RF INPUT SIGNAL LEVEL (dBm) –80 10 –70 –50 –40 –30 –20 –10 0 –70 –60 –50 –40 fRF = 50 MHz fLO = 50.455 MHz; LO Level = –10 dBm See Figure 15 IF Output –60 Mixer Output Limiter Input IF Input Mixer Input RF Input at Transformer Input –30 –20 –10 0 RECEIVER DESIGN CONSIDERATIONS The curves of signal levels at various portions of the applica- tion receiver with respect to RF input level are shown in Figure 17. This information helps determine the network topology and gain blocks required ahead of the ML13150 to achieve the desired sensitivity and dynamic range of the receiver system. The PCB is laid out to accommodate a low noise preamp followed by the 83.16 MHz SAW filter. In the application circuit (Figure 15), the input 1.0 dB compression point is –10 dBm and the input third order intercept (IP3) per- formance of the system is approximately 0 dBm (see Figure 18). TYPICAL PERFORMANCE OVER TEMPERATURE Figures 19–26 show the device performance over tempera- ture. www.lansdale.com Page 11 of 20 Issue A |
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