Cl-2t Common circuit elements and Their Constraint Equations Cl-2: Common circuit elements and Their Constraint Equations l=0 DC energy ->AC energy Source characteristic Special nonlinear resistance element: Linear source t If a nonlinear resistance works in the negative resistance zone. it will behave like a source Independent(ideal) voltage source which means it will supply energy Independent(ideal)current source quiescent operating point: The static working state in DC ----From time-domain analysis to frequency-domain analysis C1-2t Common circuit elements and Their Constraint Equations Cl-2t Common circuit elements and Their Constraint Equations Cl-2: Common cireuit elements and Their Constraint Equations 2 Classification of components, resistance element, independent source, controlled source, dynamic element source, controlled source, dynamic element Ideal voltage source dOdO Ideal voltage source Symbol: o-e-o others: 0-6o○oAC Symbol: o-e-o others: 0- Feature: two-terminal clement, its voltage is having nothing to do with its current. Feature: two-terminal clement, its voltage is having nothing to do with its current. 0 P>0? a Ik yey, p P<0 10V 匚四Q mponents paralleled with the ideal voltage source have nothing to do with the outer circuits C1-2, Common circuit elements and Their Constraint Equations C1-2: Common circuit elements and Their Constraint Equations example Ideal current source Symbol: o① Ho others:o6 2v a Feature: a two-terminal element, its current has nothing to P>0? l,=0.1A Components paralleled with the ideal voltage source have nothing (2 to do with the outer circuits IsI-I0A北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 0 I V a b p quiescent operating point : The static working state in DC 0 t V V0 0 I t I0 DC energy ->AC energy bias Source characteristic: If a nonlinear resistance works in the negative resistance zone, it will behave like a source, which means it will supply energy. C1-2：Common circuit elements and Their Constraint Equations 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 0 I V I=I0 0 I V V=V0 Special nonlinear resistance element: Linear source Independent (ideal) voltage source Independent (ideal) current source C1-2：Common circuit elements and Their Constraint Equations 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 Chapter 1 Introductory Linear Circuit Analysis ----From time-domain analysis to frequency-domain analysis C1-2：Common circuit elements and Their Constraint Equations  Classification of components, resistance element, independent source, controlled source, dynamic element Ideal voltage source Symbol： + - others： + - ~ + - DC AC Feature : two-terminal element, its voltage is having nothing to do with its current. Vs P>0 ? P<0 0 I Vs V + - + - Vs2=5V Vs1=10V R / + - Vs1× + - Vs2 Vs1× + - 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 0 I Vs V P>0 ? P<0 R + - Vs + V =Vs ？ - Conclusion：Components paralleled with the ideal voltage source have nothing to do with the outer circuits. + - Vs *** Ideal voltage source Symbol： + - others： + - ~ + - DC AC Feature : two-terminal element, its voltage is having nothing to do with its current. C1-2：Common circuit elements and Their Constraint Equations C1-2：Common circuit elements and Their Constraint Equations  Classification of components, resistance element, independent source, controlled source, dynamic element 北京大学 wwhu 北京大学 wwhu 北京大学 wwhu 北京大学 北京大学 wwhu 北京大学 wwhu 北京大学 wwhu 北京大学 北京大学 wwhu 北京大学 wwhu 北京大学 wwhu 北京大学 example： I1=？10Ω 20Ω + - 2V I1=？10Ω + - 2V I2=？ 20Ω + - 2V I2=？ I1=-0.2A I2=0.1A Components paralleled with the ideal voltage source have nothing to do with the outer circuits. *** C1-2：Common circuit elements and Their Constraint Equations 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 Ideal current source: Symbol: others: Feature: a two-terminal element, its current has nothing to do with its voltage. / Is P<0 P>0 ？ 0 I V I0 Is2=5A Is1=10A R *** Is1=10A / Is2=5A R Is1=10A / Is2=5A R C1-2：Common circuit elements and Their Constraint Equations