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CLC450 датащи(PDF) 11 Page - National Semiconductor (TI) |
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CLC450 датащи(HTML) 11 Page - National Semiconductor (TI) |
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11 / 12 page ![]() 11 http://www.national.com Where Req is the transformed value of the load imped- ance, (RL), and is approximated by: Select the transformer so that it loads the line with a value close to Zo, over the desired frequency range. The output impedance, Ro, of the CLC450 varies with frequency and can also affect the return loss. The return loss, shown below, takes into account an ideal transformer and the value of Ro. The load current (IL) and voltage (Vo) are related to the CLC450’s maximum output voltage and current by: From the above current relationship, it is obvious that an amplifier with high output drive capability is required. R R n eq L 2 = Return Loss(dB) 20log n R Z 10 2 o o ≈− ⋅ Vn V I I n o max L max ≤⋅ ≤ |
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