Electronic Devices and Amplifier Circuits

Appendix BIntroduction to Simulink ®This appendix is a brief introduction to Simulink. This author feels that we can best introduceSimulink with a few examples. Some familiarity with MATLAB is essential in understandingSimulink, and for this purpose, Appendix A is included as an introduction to MATLAB.B.1 Simulink and its Relation to MATLABThe MATLAB ® and Simulink ® environments are integrated into one entity, and thus we can analyze,simulate, and revise our models in either environment at any point. We invoke Simulink fromwithin MATLAB. We will introduce Simulink with a few illustrated examples.Example B.1For the circuit of Figure B.1, the initial conditions are i L ( 0 −) = 0 , and v c ( 0 −) = 0.5 V . We willcompute v c () t .For this example,+−R1 Ωv s () t = u 0 () tit ()Figure B.1. Circuit for Example B.1L1 ⁄ 4 HC4 ⁄ 3 F+v C () t−i i L i C C dv C= = = --------dtand by Kirchoff’s voltage law (KVL),Ri L L di L+ ------ + vdt C = u 0 () tSubstitution of (B.1) into (B.2) yieldsRC dv C-------- LC d2 v+ ---------- Cdt dt 2 + v C = u 0 () t(B.1)(B.2)(B.3)Electronic Devices and Amplifier Circuits with MATLAB® / Simulink® / SimElectronics® Examples, Third EditionCopyright © Orchard PublicationsB−1