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5应用电路研究典型应用时,假设放大器的工作频率满足a(f)>>1,并且假设采用对称反馈,即β1=β2=Rg/Rg+Rf。5.1输入电源端接双端接通常用于高速系统,以降低输电线路反射并改进信号的完整性。双端接情况下,源端输出阻抗和终端端接与传输线阻抗匹配。源端输出阻抗值一般为50Ω、75Ω、100Ω和600Ω。采用差分输入源时,端接置于线路两端。采用单端输入源时,端接置于传输线和地之间。
5 Application Circuit In a typical application, assume that the operating frequency of the amplifier satisfies a (f) >> 1 and assuming symmetrical feedback, ie β1 = β2 = Rg / Rg + Rf. 5.1 Input Power Termination Dual-termination is commonly used in high-speed systems to reduce transmission line reflections and improve signal integrity. In the case of double termination, the source output impedance and termination termination match the transmission line impedance. Source output impedance is generally 50Ω, 75Ω, 100Ω and 600Ω. When using a differential input source, the termination is placed across the line. When using a single-ended input source, the termination is placed between the transmission line and ground.