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% vim: set ts=2 sw=2 noet:
\begin{tikzpicture}[
dot/.style = {
circle,
fill = black, draw = black,
minimum size = 1.5mm,
outer sep = 0, inner sep = 0,
},
block/.style = {
rectangle, draw, thick,
black, fill = white,
minimum height = 8mm, minimum width = 8mm,
},
prod/.style = {
circle, draw, thick,
black, fill = white,
minimum size = 6mm,
inner sep = 0, outer sep = 0,
},
sum/.style = {
circle, draw, thick,
black, fill = white,
minimum size = 4mm,
},
]
\matrix[column sep = 5mm, row sep = 3mm] {
\node[block] (B0) {\(z^{-1}\)}; & \node[dot] (D0) {}; &
\node[block] (B1) {\(z^{-1}\)}; & \node[dot] (D1) {}; &
\node[block] (B2) {\(z^{-1}\)}; & \node[dot] (D2) {}; & \node (dots) {\ldots}; &
\node[block] (Bk) {\(z^{-1}\)}; & \node[dot] (Dk) {};
\\
& \node[prod] (P0) {\(\times\)}; &
& \node[prod] (P1) {\(\times\)}; &
& \node[prod] (P2) {\(\times\)}; & &
& \node[prod] (Pk) {\(\times\)}; &
\\
& & & & \node[sum] (S) {\(\Sigma\)}; \\
};
\draw[thick]
% tapped delayed line
(B0.west) -- ++(-5mm,0) node[left] {\(s\)}
(B0.east) -- (D0) -- (B1.west)
(B1.east) -- (D1) -- (B2.west)
(B2.east) -- (D2) -- (dots) -- (Bk.west)
(Bk.east) -- (Dk) -- ++(5mm,0)
% taps asd sum
(D0) -- (P0) |- (S)
(D1) -- (P1) -- ++(0,-6mm) -- (S)
(D2) -- (P2) -- ++(0,-6mm) -- (S)
(Dk) -- (Pk) |- (S)
% product weights
(P0.west) -- ++(-3mm,0) node[left] {\(h_1\)}
(P1.west) -- ++(-3mm,0) node[left] {\(h_2\)}
(P2.west) -- ++(-3mm,0) node[left] {\(h_3\)}
(Pk.west) -- ++(-3mm,0) node[left] {\(h_l\)}
% result
(S.south) |- ++(1cm,-3mm) node[right] {\(r\)}
;
\end{tikzpicture}
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