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LT10.7MHYDP Datasheet(PDF) 3 Page - Token Electronics Industry Co., Ltd. |
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LT10.7MHYDP Datasheet(HTML) 3 Page - Token Electronics Industry Co., Ltd. |
3 / 4 page 03 of 04 Test Circuit Characteristics LT10.7M Ceramic Filters for FM Receiver LT10.7MA5 LT10.7MS2 LT10.7MS3 Frequency(MHz) Frequency(MHz) 0 Frequency(MHz) 10 20 30 40 10.3 10.5 10.7 11.1 10.9 40 30 20 10 0 0 10 20 30 40 10.3 10.3 10.5 10.5 10.7 10.7 10.9 10.9 11.1 11.1 ~ ③ ① ② R1 R2 Rg S.S.G C RF V.M Rg + R1 = R2 = 330 Ω C = 10pF Including stray capacitance and input capacitance of RF voltmeter 1. When using ceramic filters, it is most important to match the input/output load to impedance 330 ohm (LT10.7MA19 is 470 ohm matching). Waveform symmetry is damaged when reactance is added to the input/output load. 2. Two ceramic filters directly connected can be used for high selectivity. For reducing waveform variation, it is recommended to input a buffer AMP between ceramic filters. 3. The LT10.7M series are of input/output symmetric structure so that in theory there is no input/output directionality. Actual circuits may use different input/output loading conditions (for example, mismatched impedance) or capacitance load. In such cases, the waveform will be a little changed by the direction of the input/output of the ceramic filters. TOKEN Version 2010 http://www.token.com.tw/ rfq token.com.tw |
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