% Example for an interconnection of signal flow diagrams. % % Author: Dr. Karlheinz Ochs, Ruhr-University of Bochum, Germany % Version: 0.1 % Date: 2007/01/05 \documentclass{article} \usepackage{signalflowdiagram} \begin{document} % An FIR filter \begin{signalflow}[node distance=9mm]{Finite impulse response filter of order $n$}% % building blocks \tikzgrid{ \node[input] (in) {$x(t)$} & \node[node] (n0) {} & \node[delay] (d1) {$T$} & \node[node] (n1) {} & \node[delay] (d2) {$T$} & \node[node] (n2) {} & \node[coordinate] (c1) {} & \node[coordinate] (c3) {} & \node[delay] (dn) {$T$} & \\ & \node[multiplier] (m0) {$\alpha_0$} & & \node[multiplier] (m1) {$\alpha_1$} & & \node[multiplier] (m2) {$\alpha_2$} & & & & \node[multiplier] (mn) {$\alpha_n$} \\ & & & \node[adder] (a1) {} & & \node[adder] (a2) {} & \node[coordinate] (c2) {} & \node[coordinate] (c4) {} & & \node[adder] (an) {} & \node[output] (out) {$y(t)$} } % signal paths \path[r>] (in) -- (n0); \path[r>] (n0) -- (d1); \path[r>] (d1) -- (n1); \path[r>] (n1) -- (d2); \path[r>] (d2) -- (n2); \path[r>] (n2) -- (c1); % continuation \path[r.] (c1) -- (c3); % continuation \path[r>] (c3) -- (dn); % continuation \path[r>] (n0) -- (m0); \path[r>] (n1) -- (m1); \path[r>] (n2) -- (m2); \path[r>] (dn) -| (mn); \path[r>] (m0) |- (a1); \path[r>] (m1) -- (a1); \path[r>] (m2) -- (a2); \path[r>] (mn) -- (an); \path[r>] (a1) -- (a2); \path[r>] (a2) -- (c2); % continuation \path[r.] (c2) -- (c4); % continuation \path[r>] (c4) -- (an); % continuation \path[r>] (an) -- (out); \end{signalflow} \end{document}