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EP2SGX60C 数据表(PDF) 34 Page - Altera Corporation |
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EP2SGX60C 数据表(HTML) 34 Page - Altera Corporation |
34 / 326 page 2–16 Altera Corporation Stratix II GX Device Handbook, Volume 1 October 2007 Transceivers Figure 2–13. Programmable Receiver Termination If a design uses external termination, the receiver must be externally terminated and biased to 0.85 V or 1.2 V. Figure 2–14 shows an example of an external termination and biasing circuit. Figure 2–14. External Termination and Biasing Circuit Programmable Equalizer The Stratix II GX receivers provide a programmable receive equalization feature to compensate the effects of channel attenuation for high-speed signaling. PCB traces carrying these high-speed signals have low-pass filter characteristics. The impedance mismatch boundaries can also cause signal degradation. The equalization in the receiver diminishes the lossy attenuation effects of the PCB at high frequencies. Differential Input Buffer 50, 60, or 75 Ω 50, 60, or 75 Ω VCM Transmission Line C1 R1/R2 = 1K VDD × {R2/(R1 + R 2)} = 0.85/1.2 V 50/60/75- Ω Termination Resistance R1 R2 VDD Receiver External Termination and Biasing Stratix II GX Device Receiver External Termination and Biasing RXIP RXIN Receiver |
类似零件编号 - EP2SGX60C |
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类似说明 - EP2SGX60C |
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