\NeedsTeXFormat{LaTeX2e}[1994/06/01]
\ProvidesPackage{tikzblocks}[2016/04/08 TikZ Blocks]

\usetikzlibrary{automata,arrows,calc,intersections,matrix,patterns,positioning,shapes,decorations,decorations.markings,math}

\def\blockcolor{white}
\newdimen\blocksize
\blocksize = 6mm
\tikzmath{\fontscale = \blocksize/10mm;}

\newdimen\scaledlinewidth
\scaledlinewidth = 0.5pt
\setlength{\scaledlinewidth}{\fontscale\scaledlinewidth}

\newcommand{\scale}[1]{\scalebox{\fontscale}{#1}}

\pgfdeclaredecoration{complete sines}{initial}
{
  \state{initial}[width = +0pt, next state = sine, persistent precomputation = {\pgfmathsetmacro\matchinglength{
    \pgfdecoratedinputsegmentlength / int(\pgfdecoratedinputsegmentlength/\pgfdecorationsegmentlength)
  }
  \setlength{\pgfdecorationsegmentlength}{\matchinglength pt}}]{}
  \state{sine}[width = \pgfdecorationsegmentlength]{
    \pgfpathsine{\pgfpoint{0.25\pgfdecorationsegmentlength}{0.5\pgfdecorationsegmentamplitude}}
    \pgfpathcosine{\pgfpoint{0.25\pgfdecorationsegmentlength}{-0.5\pgfdecorationsegmentamplitude}}
    \pgfpathsine{\pgfpoint{0.25\pgfdecorationsegmentlength}{-0.5\pgfdecorationsegmentamplitude}}
    \pgfpathcosine{\pgfpoint{0.25\pgfdecorationsegmentlength}{0.5\pgfdecorationsegmentamplitude}}
  }
  \state{final}{}
}

\newcommand{\textdirectcurrent}{%
  \settowidth{\dimen0}{$ = $}%
  \vbox to .85ex {\offinterlineskip
    \hbox to \dimen0{\leaders\hrule\hfill}
    \vskip.35ex
    \hbox to \dimen0{%
      \leaders\hrule\hskip.2\dimen0\hfill
      \leaders\hrule\hskip.2\dimen0\hfill
      \leaders\hrule\hskip.2\dimen0
    }
    \vfill
  }%
}

\def\ppbb{path picture bounding box}

\tikzset{
  auto,
  > = latex',
  anchor = center,
  node distance = \blocksize,
  every node/.style =
  {
    line width = \scaledlinewidth
  },
  every path/.style =
  {
    line width = \scaledlinewidth
  },
  mark red/.style =
  {
    color = red,fill = red!20
  },
  mark blue/.style =
  {
    color = blue,fill = blue!20
  },
  mark yellow/.style =
  {
    color = orange,fill = yellow!20
  },
  mixer/.style =
  {
    draw,
    fill = \blockcolor,
    circle,
    inner sep = 0pt,
    minimum width = 0.5\blocksize,
    path picture =
    {
      \draw
        (\ppbb.north west) -- (\ppbb.south east)
        (\ppbb.south west) -- (\ppbb.north east);
    }
  },
  wave/.style =
  {
    decorate,
    decoration =
    {
      complete sines,
      amplitude = 0.1\blocksize,
      segment length = 0.6\blocksize
    }
  },
  block/.style =
  {
    draw,
    fill = \blockcolor,
    rectangle,
    minimum height = \blocksize,
    minimum width = \blocksize,
    anchor = center,
    inner sep = 0.1\blocksize
  },
  osciwave/.style =
  {
    decorate,
    decoration =
    {
      complete sines,
      amplitude = 0.35\blocksize,
      segment length = 0.4\blocksize
    }
  },
  bpf/.style =
  {
    draw,
    block,
    path picture =
    {
      \draw[wave] ([xshift = -0.3\blocksize, yshift = 0.2\blocksize]\ppbb.center) -- +(0.6\blocksize,0) {};
      \draw[wave] ([xshift = -0.3\blocksize]\ppbb.center) -- +(0.6\blocksize,0) {};
      \draw[wave] ([xshift = -0.3\blocksize, yshift = -0.2\blocksize]\ppbb.center) -- +(0.6\blocksize,0) {};
      \draw[transform canvas = {yshift = 0.2\blocksize}] ([xshift = 0.05\blocksize,yshift = 0.05\blocksize]\ppbb.center) -- ([xshift = -0.05\blocksize,yshift = -0.05\blocksize]\ppbb.center) {};
      \draw[transform canvas = {yshift = -0.2\blocksize}] ([xshift = 0.05\blocksize,yshift = 0.05\blocksize]\ppbb.center) -- ([xshift = -0.05\blocksize,yshift = -0.05\blocksize]\ppbb.center) {};
    }
  },
  bsf/.style =
  {
    draw,
    block,
    path picture =
    {
      \draw[wave] ([xshift = -0.3\blocksize, yshift = 0.2\blocksize]\ppbb.center) -- +(0.6\blocksize,0) {};
      \draw[wave] ([xshift = -0.3\blocksize]\ppbb.center) -- +(0.6\blocksize,0) {};
      \draw[wave] ([xshift = -0.3\blocksize, yshift = -0.2\blocksize]\ppbb.center) -- +(0.6\blocksize,0) {};
      \draw ([xshift = 0.05\blocksize,yshift = 0.05\blocksize]\ppbb.center) -- ([xshift = -0.05\blocksize,yshift = -0.05\blocksize]\ppbb.center) {};
    }
  },
  lpf/.style =
  {
    draw,
    block,
    path picture =
    {
      \draw[wave] ([xshift = -0.3\blocksize, yshift = 0.1\blocksize]\ppbb.center) -- +(0.6\blocksize,0) {};
      \draw[wave] ([xshift = -0.3\blocksize, yshift = -0.1\blocksize]\ppbb.center) -- +(0.6\blocksize,0) {};
      \draw[transform canvas = {yshift = 0.1\blocksize}] ([xshift = 0.05\blocksize,yshift = 0.05\blocksize]\ppbb.center) -- ([xshift = -0.05\blocksize,yshift = -0.05\blocksize]\ppbb.center) {};
    }
  },
  hpf/.style =
  {
    draw,
    block,
    path picture =
    {
      \draw[wave] ([xshift = -0.3\blocksize, yshift = 0.1\blocksize]\ppbb.center) -- +(0.6\blocksize,0) {};
      \draw[wave] ([xshift = -0.3\blocksize, yshift = -0.1\blocksize]\ppbb.center) -- +(0.6\blocksize,0) {};
      \draw[transform canvas = {yshift = -0.1\blocksize}] ([xshift = 0.05\blocksize,yshift = 0.05\blocksize]\ppbb.center) -- ([xshift = -0.05\blocksize,yshift = -0.05\blocksize]\ppbb.center) {};
    }
  },
  osc/.style =
  {
    draw,
    fill = \blockcolor,
    circle,
    inner sep = 0pt,
    minimum width = 0.8\blocksize,
    path picture =
    {
      \draw[osciwave] ([xshift = -0.2\blocksize]\ppbb.center) -- +(0.4\blocksize,0) {};
    }
  },
  motor/.style =
  {
    draw,
    fill = \blockcolor,
    circle,
    inner sep = 0pt,
    minimum width = 0.8\blocksize,
    path picture =
    {
      \node[scale = \fontscale,anchor = center] (\ppbb.center) {M};
    }
  },
  generator/.style =
  {
    draw,
    fill = \blockcolor,
    circle,
    inner sep = 0pt,
    minimum width = 0.8\blocksize,
    path picture =
    {
      \node[scale = \fontscale,anchor = center] (\ppbb.center) {G};
    }
  },
  osc var/.style =
  {
    osc,
    append after command =
    {
      \pgfextra
      {%
        \draw[->] ([xshift = -0.5\blocksize,yshift = -0.5\blocksize]\tikzlastnode.center) -- +(\blocksize,\blocksize) {};
      }
    },
    path picture =
    {
      \draw[osciwave] ([xshift = -0.2\blocksize]\ppbb.center) -- +(0.4\blocksize,0) {};
      \draw (\ppbb.south west) -- (\ppbb.north east) {};
    }
  },
  integ/.style =
  {
    draw,
    block,
    path picture =
    {
      \node[scale = \fontscale,anchor = center] at (\ppbb.center) {\scalebox{1.3}{$\int$}};
    }
  },
  integ var/.style args =
  {#1}{
    draw,
    block,
    path picture =
    {
      \node[scale = \fontscale,anchor = center] at (\ppbb.center) {\scalebox{1.3}{$\int$}$\cdot d#1$};
    }
  },
  differentiator/.style =
  {
    draw,
    block,
    path picture =
    {
      \node[scale = \fontscale,anchor = center] at (\ppbb.center) {\scalebox{1.3}{$\frac{d}{dt}$}};
    }
  },
  upsampler/.style args =
  {#1}{
    draw,
    block,
    path picture =
    {
      \node[scale = \fontscale,anchor = center] at (\ppbb.center) {$\uparrow$\,#1};
    }
  },
  downsampler/.style args =
  {#1}{
    draw,
    block,
    path picture =
    {
      \node[scale = \fontscale,anchor = center] at (\ppbb.center) {$\downarrow$\,#1};
    }
  },
  diode demodulator/.style =
  {
    draw,
    block,
    path picture =
    {
      \draw ([xshift = -0.3\blocksize]\ppbb.center) -- +(0.6\blocksize,0) {};
      \draw ([xshift = 0.15\blocksize]\ppbb.center) -- ([xshift = -0.15\blocksize,yshift = 0.15\blocksize]\ppbb.center) -- ([xshift = -0.15\blocksize,yshift = -0.15\blocksize]\ppbb.center) -- cycle {};
      \draw ([xshift = 0.15\blocksize, yshift = 0.15\blocksize]\ppbb.center) -- +(0,-0.3\blocksize) {};
    }
  },
  amp/.style =
  {
    draw,
    block,
    path picture =
    {
      \draw ([xshift = -0.2\blocksize,yshift = 0.3\blocksize]\ppbb.center) -- ([xshift = 0.3\blocksize]\ppbb.center) -- ([xshift = -0.2\blocksize,yshift = -0.3\blocksize]\ppbb.center) -- cycle {};
    }
  },
  sample and hold/.style =
  {
    draw,
    block,
    path picture =
    {
      \node[anchor = center,scale = \fontscale] at (\ppbb.center) {S\&{}H};
    }
  },
  converter/.style args =
  {from #1 to #2}{
    draw,
    block,
    path picture =
    {
      \draw (\ppbb.south west) -- (\ppbb.north east) {};
      \node[scale = \fontscale, anchor = center] at ([xshift = -0.2\blocksize,yshift = 0.2\blocksize]\ppbb.center) {\small #1};
      \node[scale = \fontscale, anchor = center] at ([xshift = 0.2\blocksize,yshift = -0.2\blocksize]\ppbb.center) {\small #2};
    }
  },
  rectifier/.style =
  {
    draw,
    block,
    path picture =
    {
      \draw (\ppbb.south west) -- (\ppbb.north east) {};
      \node[scale = \fontscale, anchor = center] at ([xshift = -0.2\blocksize,yshift = 0.16\blocksize]\ppbb.center) {$\sim$};
      \node[scale = \fontscale, anchor = center] at ([xshift = 0.2\blocksize,yshift = -0.2\blocksize]\ppbb.center) {\textdirectcurrent};
    }
  },
  transformer/.style =
  {
    draw,
    block,
    path picture =
    {
      \draw ([xshift = -0.3\blocksize,yshift = 0.4\blocksize]\ppbb.center) -- ([xshift = -0.1\blocksize,yshift = 0.4\blocksize]\ppbb.center) -- +(0,-0.8\blocksize) -- ([xshift = -0.3\blocksize,yshift = -0.4\blocksize]\ppbb.center);
      \draw ([xshift = 0.3\blocksize,yshift = 0.4\blocksize]\ppbb.center) -- ([xshift = 0.1\blocksize,yshift = 0.4\blocksize]\ppbb.center) -- +(0,-0.8\blocksize) -- ([xshift = 0.3\blocksize,yshift = -0.4\blocksize]\ppbb.center);
    }
  },
  deadtime/.style args =
  {#1}{
    draw,
    block,
    path picture =
    {
      \draw ([xshift = -0.3\blocksize,yshift = -0.3\blocksize]\ppbb.center) -- +(0,0.2\blocksize);
      \draw ([xshift = 0.3\blocksize,yshift = -0.3\blocksize]\ppbb.center) -- +(0,0.2\blocksize);
      \draw ([xshift = -0.3\blocksize,yshift = -0.2\blocksize]\ppbb.center) -- +(0.6\blocksize, 0);
      \node[anchor = center,scale = \fontscale] at ([yshift = 0.1\blocksize]\ppbb.center) {#1};
    }
  },
  schmitt trigger/.style =
  {
    draw,
    block,
    path picture =
    {
      \draw ([xshift = -0.35\blocksize,yshift = -0.3\blocksize]\ppbb.center) -- +(0.35\blocksize,0) -- ([xshift = 0.2\blocksize,yshift = 0.3\blocksize]\ppbb.center) -- +(0.15\blocksize, 0);
      \draw ([xshift = 0.2\blocksize,yshift = 0.3\blocksize]\ppbb.center) -- +(-0.2\blocksize,0) -- ([xshift = -0.2\blocksize,yshift = -0.3\blocksize]\ppbb.center);
    }
  },
  nonlinear fcn/.style args =
  {#1}{
    draw,
    block,
    path picture =
    {
      \node[scale = \fontscale,anchor = center] (\ppbb.center) {$#1(\cdot)$};
    }
  },
  zero order hold/.style args =
  {#1}{
    draw,
    block,
    path picture =
    {
      \draw ([xshift = -0.3\blocksize,yshift = -0.3\blocksize]\ppbb.center) -- +(0.2\blocksize,0) -- +(0.2\blocksize,0.6\blocksize) -- +(0.3\blocksize,0.6\blocksize) -- +(0.3\blocksize,0.4\blocksize) -- +(0.4\blocksize,0.4\blocksize) -- +(0.4\blocksize,0.2\blocksize) -- +(0.5\blocksize,0.2\blocksize) -- +(0.6\blocksize,0.2\blocksize);
    }
  },
  first order hold/.style args =
  {#1}{
    draw,
    block,
    path picture =
    {
      \draw ([xshift = -0.3\blocksize,yshift = -0.3\blocksize]\ppbb.center) -- +(0.2\blocksize,0.1\blocksize) -- +(0.3\blocksize,0.6\blocksize) -- +(0.4\blocksize,0.4\blocksize) -- +(0.5\blocksize,0.2\blocksize) -- +(0.6\blocksize,0.2\blocksize);
    }
  },
  divider/.style args =
  {#1}{
    draw,
    block,
    path picture =
    {
      \node[scale = \fontscale, anchor = center] (\ppbb.center) {$\div #1$};
    }
  },
  delay/.style args =
  {#1}{
    draw,
    block,
    node contents =
    {
      \scalebox{\fontscale}{$z^{-#1}$}
    }
  },
  transfer fcn/.style args =
  {#1}{
    draw,
    block,
    node contents =
    {
      \scalebox{\fontscale}{#1}
    }
  },
  gain/.style =
  {
    fill = \blockcolor,
    text height = 1.5ex,
    text depth = .25ex,
    draw,
    isosceles triangle,
    minimum height = 10mm,
    minimum width = 10mm,
    anchor = center,
    scale = \fontscale
  },
  sum/.style args =
  {#1}{
    draw,
    anchor = center,
    scale = \fontscale,
    fill = \blockcolor,
    circle,
    inner sep = 0.05\blocksize,
    minimum size = 0.15\blocksize,
    node contents =
    {
      \small #1
    }
  },
  junction/.style =
  {
    circle,inner sep = 0pt,
    minimum size = 0.1\blocksize,
    fill = black,
    draw = black,
    node distance = 0.5\blocksize
  },
  inout/.style =
  {
    draw,
    circle,
    inner sep = 0pt,
    minimum size = 0.1\blocksize,
    node distance = 10mm
  },
  mid arrow/.style =
  {
    postaction =
    {
      decorate,
      decoration =
      {
        markings,
        mark = at position .5 with
        {
          \arrow[#1]{latex'}
        }
      }
    }
  },
  shorten <>/.style =
  {
    shorten > = 0.1\blocksize,
    shorten < = 0.1\blocksize
  },
  between/.style args =
  {#1 and #2}{
    at = ($(#1)!0.5!(#2)$)
  },
  intersection of/.style args =
  {#1 and #2}{
    at = (#1 |- #2)
  },
  saturation/.style =
  {
    block,
    path picture =
    {
      \draw[shorten <>] (\ppbb.west) -- (\ppbb.east);
      \draw[shorten <>] (\ppbb.south) -- (\ppbb.north);
      \draw ([shift = (45:0.2\blocksize)]\ppbb.south west) -- ++(0:0.2\blocksize)--(\ppbb.center);
      \draw ([shift = (225:0.2\blocksize)]\ppbb.north east) -- ++(180:0.2\blocksize)--(\ppbb.center);
    },
  },
  dead zone/.style =
  {
    block,
    path picture =
    {
      \draw[shorten <>] (\ppbb.west) -- (\ppbb.east);
      \draw[shorten <>] (\ppbb.south) -- (\ppbb.north);
      \draw ([shift = (45:0.2\blocksize)]\ppbb.south west) -- ([xshift = -0.15\blocksize]\ppbb.center);
      \draw ([shift = (225:0.2\blocksize)]\ppbb.north east) -- ([xshift = 0.15\blocksize]\ppbb.center);
    },
  }
}