[工學(xué)]chapter18英文版電路二端口網(wǎng)絡(luò)(已修改)
2025-01-31 10:52 本頁面
【正文】 Chapter 18 Twoport works 1． 2． 二端口網(wǎng)絡(luò)的轉(zhuǎn)移函數(shù)。 要求一般理解與掌握的內(nèi)容有： 3． 4． 二端口網(wǎng)絡(luò)的連接。 難點(diǎn)： ?181 Introduction ?182 Impedance Parameters ?184 Hybrid Parameters ?185 Transmission Parameters ?186 Relationships between Parameters ?187 Interconnection of Networks ?1810 Summary and Review ?183 Admittance Parameters 181 Introduction 1. Terms 2. Introduction of this chapter Immittance parameters 導(dǎo)抗參數(shù) Hybrid parameters 混合參數(shù) 1. terms synthesis 綜合 U?I?Linear work 1U? 2U?1I? 2I?Linear work A pair of terminals through which a current may enter or leave a work is known as a port. A twoport work is an electrical work with two separate ports for input and output. 2. Introduction of this chapter 182 Impedance Parameters 1U?2U?1I? 2I?Linear work The terminal voltages can be related to the terminal currents as 2121111 IZIZU ??? ??(1) 2221212 IZIZU ??? ?? (2) ??????????????????????????21212221121121 ][IIZIIZZZZUU??????or in matrix form as where the Z terms are called the impedance parameters, or simply Z parameters, and have units of ohms. Z The values of the parameters can be evaluated by setting (input port opencircuited) or (output port opencircuited). Thus, 01 ?I?02 ?I?011112 ??IIUZ???021121 ??IIUZ???012212 ??IIUZ???022221 ??IIUZ???Since the Z parameters are obtained by opencircuiting the input or output port, they are also called the opencircuit impedance parameters. specifically, Z11= Opencircuit input impedance Z12= Opencircuit transfer impedance from port 1 to port 2 Z21= Opencircuit transfer impedance from port 2 to port 1 Z22= Opencircuit output impedance 1U?2U?1I? 2I?Z1 Z3 Z2 Example: Determine the z parameters for the circuit in Fig.(a). Solution: 011112 ??IIUZ???012212 ??IIUZ???=0 21 ZZ ??2Z?1U?1I? 2I?Z1 Z3 Z2 2U?021121 ??IIUZ???022221 ??IIUZ???1U?2U?1I? 2I
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1