% Copyright 2007-2009 by Massimo Redaelli
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Public License.
%
% See the file doc/LICENSE for more details.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Quadripoles

\long\def\pgfcircdeclarequadpole#1#2#3{
	\pgfdeclareshape{#1}
	{
	  \anchor{center}{
	  	\northwest
		\pgf@x=0pt
	  }
	  \savedanchor\northwest{%
		\pgf@y=\pgfkeysvalueof{/tikz/circuitikz/quadpoles/#1/height}\pgf@circ@Rlen
		\pgf@y=.5\pgf@y
		\pgf@x=.5\pgf@circ@Rlen
		\pgf@x=-\pgfkeysvalueof{/tikz/circuitikz/quadpoles/#1/width}\pgf@x
	  }
	  \anchor{A2}{
		\northwest
		\pgf@y=-\pgf@y
	  }
	  \anchor{B1}{
		\northwest
		\pgf@x=-\pgf@x
	  }
	  \anchor{A1}{
		\northwest
	  }
	  \anchor{B2}{
		\northwest
		\pgf@x=-\pgf@x
		\pgf@y=-\pgf@y
	  }
	  \anchor{north}{
	  	\northwest
		\pgf@x=0pt
	  }
	  \anchor{south}{
	  	\northwest
		\pgf@x=0pt
		\pgf@y=-\pgf@y
	  }
	  \anchor{west}{
	  	\northwest
		\pgf@y=0pt
	  }
	  \anchor{east}{
	  	\northwest
		\pgf@y=0pt
		\pgf@x=-\pgf@x
	  }
	  \anchor{south west}{
		\northwest
		\pgf@y=-\pgf@y
	  }
	  \anchor{north east}{
		\northwest
		\pgf@x=-\pgf@x
	  }
	  \anchor{north west}{
		\northwest
	  }
	  \anchor{south east}{
		\northwest
		\pgf@x=-\pgf@x
		\pgf@y=-\pgf@y
	  }	  
	  \anchor{base}{
	  	\northwest
		\pgf@x=0pt	  	
	  }
	  #3
	  \backgroundpath{			
			\pgfsetcolor{\pgfkeysvalueof{/tikz/circuitikz/color}}	
			
			\northwest
			\pgf@circ@res@up = \pgf@y 
			\pgf@circ@res@down = -\pgf@y
			\pgf@circ@res@right = -\pgf@x
			\pgf@circ@res@left = \pgf@x
			
			#2
	  
	  }
	}
}



\def\pgf@circ@drawtransformerbasicanchor{
	\pgfkeysvalueof{/tikz/circuitikz/quadpoles/trans/height}
	 \anchor{AA2}{
		\northwest
		\pgf@x=\pgfkeysvalueof{/tikz/circuitikz/quadpoles/transformer/width1}\pgf@x
		\pgf@x=.7\pgf@x
		\pgf@y=-\pgf@y
		\pgf@y=\pgfkeysvalueof{/tikz/circuitikz/quadpoles/transformer/height1}\pgf@y
	  }
	  \anchor{BB1}{
		\northwest
		\pgf@x=-\pgf@x
		\pgf@x=\pgfkeysvalueof{/tikz/circuitikz/quadpoles/transformer/width1}\pgf@x
		\pgf@x=.7\pgf@x
		\pgf@y=\pgfkeysvalueof{/tikz/circuitikz/quadpoles/transformer/height1}\pgf@y
	  }
	  \anchor{AA1}{
		\northwest
		\pgf@x=\pgfkeysvalueof{/tikz/circuitikz/quadpoles/transformer/width1}\pgf@x
		\pgf@x=.7\pgf@x
		\pgf@y=\pgfkeysvalueof{/tikz/circuitikz/quadpoles/transformer/height1}\pgf@y
	  }
	  \anchor{BB2}{
		\northwest
		\pgf@x=-\pgf@x
		\pgf@x=\pgfkeysvalueof{/tikz/circuitikz/quadpoles/transformer/width1}\pgf@x
		\pgf@x=.7\pgf@x
		\pgf@y=-\pgf@y
		\pgf@y=\pgfkeysvalueof{/tikz/circuitikz/quadpoles/transformer/height1}\pgf@y
	  }
}

\def\pgf@circ@drawtransformerbasicbody{
	\def\stretto{.4}
	\pgfscope             
			\pgfslopedattimetrue 
			\pgfallowupsidedownattimetrue
			\pgftransformlineattime{.5}{%
				\pgfpoint%
					{\stretto\pgf@circ@res@left}%
					{\pgf@circ@res@up}%
			}{%
				\pgfpoint
					{\stretto\pgf@circ@res@left}%
					{\pgf@circ@res@down}%
			}
			
			\edef\pgf@circ@temp{\ctikzvalof{inductor}}%
			\def\pgf@temp{european}%
			\ifx\pgf@temp\pgf@circ@temp%
				\pgfnode{fullgenericshape}{center}{}{pgf@inductor1}{\pgfusepath{stroke}}
			\else%
				\def\pgf@temp{cute}
				\ifx\pgf@temp\pgf@circ@temp%
					\pgfnode{cuteinductorshape}{center}{}{pgf@inductor1}{\pgfusepath{stroke}}
				\else%
					\pgfnode{americaninductorshape}{center}{}{pgf@inductor1}{\pgfusepath{stroke}}
				\fi%
			\fi%

			
	\endpgfscope
	\pgfscope             
			\pgfslopedattimetrue 
			\pgfallowupsidedownattimetrue
			\pgftransformlineattime{.5}{%
				\pgfpoint%
					{\stretto\pgf@circ@res@right}%
					{\pgf@circ@res@down}%
			}{%
				\pgfpoint
					{\stretto\pgf@circ@res@right}%
					{\pgf@circ@res@up}%
			}

			\edef\pgf@circ@temp{\ctikzvalof{inductor}}%
			\def\pgf@temp{european}%
			\ifx\pgf@temp\pgf@circ@temp%
				\pgfnode{fullgenericshape}{center}{}{pgf@inductor2}{\pgfusepath{stroke}}
			\else%
				\def\pgf@temp{cute} 
				\ifx\pgf@temp\pgf@circ@temp%
					\pgfnode{cuteinductorshape}{center}{}{pgf@inductor2}{\pgfusepath{stroke}}
				\else%
					\pgfnode{americaninductorshape}{center}{}{pgf@inductor2}{\pgfusepath{stroke}}
				\fi%
			\fi%
			
	\endpgfscope
	
	\pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}}
	\pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@up}}
	\pgfpathlineto{\pgfpointanchor{pgf@inductor1}{b}}
	
	\pgfpathmoveto{\pgfpointanchor{pgf@inductor1}{a}}
	\pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@down}}
	\pgfpathlineto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@down}}
	
	\pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@up}}
	\pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@up}}
	\pgfpathlineto{\pgfpointanchor{pgf@inductor2}{a}}
	
	\pgfpathmoveto{\pgfpointanchor{pgf@inductor2}{b}}
	\pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@down}}
	\pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}
	
	\pgfusepath{draw}
	
}


	
	% contrib Kristofer M. Monisit
	
	\pgfdeclareshape{fd op amp}
	{
	  \anchor{center}{\pgfpointorigin}
	  \savedanchor\northwest{%
		\pgf@y=\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/height}\pgf@circ@Rlen
		\pgf@y=.5\pgf@y
		\pgf@x=-\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/width}\pgf@circ@Rlen
		\pgf@x=.5\pgf@x
	  }
	  \anchor{south}{
		\northwest
		\pgf@y=-\pgf@y
	  }
	  \anchor{north}{
		\northwest
	  }
	  \savedanchor\left{%
	  	\pgf@y=0pt
	  }
	  \savedanchor\inOne{%
		\pgf@y=\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/height}\pgf@circ@Rlen
		\pgf@y=.5\pgf@y
		\pgf@y=\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/input height}\pgf@y
		\pgf@x=-\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/width}\pgf@circ@Rlen
		\pgf@x=.5\pgf@x
	  }
	  \anchor{-}{
		\inOne
	  }
	  \anchor{+}{
		\inOne
		\pgf@y=-\pgf@y
	  }
	  \savedanchor\up{%
		\pgf@y=\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/height}\pgf@circ@Rlen
		\pgf@y=.5\pgf@y
		\pgf@x=-\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/width}\pgf@circ@Rlen
		\pgf@x=.5\pgf@x
			\pgf@circ@res@up = \pgf@y
			\pgf@circ@res@right = -\pgf@x
			\pgf@circ@res@left = \pgf@x
	    \pgfpointlineattime{
			\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/up pos}}{
			\pgfpoint{
				\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/port width}\pgf@circ@res@left}
				{\pgf@circ@res@up}}
			{\pgfpoint{.7\pgf@circ@res@right}{0pt}}
	  }
	  \anchor{up}{
		\up
	  }
	  \anchor{down}{
		\up
		\pgf@y=-\pgf@y
	  }
	  \anchor{out +}{
		\northwest
		\pgf@y=.5\pgf@y
		\pgf@x=-.7\pgf@x
	  }
	  \anchor{out -}{
		\northwest
		\pgf@y=-.5\pgf@y
		\pgf@x=-.7\pgf@x
	  }
	  \anchor{west}{
	  	\left
      }
		\anchor{east}{
			\left
			\pgf@x=-\pgf@x
		}

	  \backgroundpath{
			\pgfsetcolor{\pgfkeysvalueof{/tikz/circuitikz/color}}

      \northwest
      \pgf@circ@res@up = \pgf@y
      \pgf@circ@res@down = -\pgf@y
      \pgf@circ@res@right = -\pgf@x
      \pgf@circ@res@left = \pgf@x

      % Negative input terminal
      \pgfpathmoveto{\pgfpoint
        {\pgf@circ@res@left}
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/input height}\pgf@circ@res@up}}
      \pgfpathlineto{\pgfpoint
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/port width}\pgf@circ@res@left}
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/input height}\pgf@circ@res@up}}
      \pgftext[left, at=\pgfpoint{\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/port width}\pgf@circ@res@left}{\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/input height}\pgf@circ@res@up}]{\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/font} $-$}
  

      % Positive input terminal
      \pgfpathmoveto{\pgfpoint
        {\pgf@circ@res@left}
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/input height}\pgf@circ@res@down}}
      \pgfpathlineto{\pgfpoint
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/port width}\pgf@circ@res@left}
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/input height}\pgf@circ@res@down}}
      \pgftext[left, at=\pgfpoint{\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/port width}\pgf@circ@res@left}{\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/input height}\pgf@circ@res@down}]{\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/font} $+$}
  

      % Negative output terminal
      \pgfpathmoveto{\pgfpoint
        {0.7\pgf@circ@res@right}
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/input height}\pgf@circ@res@down}}
      \pgfpathlineto{\pgfpoint
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/port width}}
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/input height}\pgf@circ@res@down}}
      \pgftext[left, at=\pgfpoint{0.3\pgf@circ@res@left}{.3\pgf@circ@res@down}]{\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/font} $-$}
  

      % Positive output terminal
      \pgfpathmoveto{\pgfpoint
        {0.7\pgf@circ@res@right}
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/input height}\pgf@circ@res@up}}
      \pgfpathlineto{\pgfpoint
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/port width}}
        {\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/input height}\pgf@circ@res@up}}
      \pgftext[left, at=\pgfpoint{0.3\pgf@circ@res@left}{.3\pgf@circ@res@up}]{\pgfkeysvalueof{/tikz/circuitikz/tripoles/op amp/font} $+$}
  
	  \pgfsetrectcap
      % Draw them all!
      \pgfusepath{draw}

      % Triangle
      \pgfscope
        \pgfsetlinewidth{2\pgflinewidth}
        \pgftransformxshift{.7\pgf@circ@res@left}
        \pgf@circ@res@step=\pgf@circ@res@right
        \advance\pgf@circ@res@step by -\pgf@circ@res@left
        \pgf@circ@res@step=.7\pgf@circ@res@step
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@step}{0pt}}
        \pgfpathlineto{\pgfpoint{0pt}{\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpoint{0pt}{\pgf@circ@res@down}}
        \pgfpathlineto{\pgfpoint{\pgf@circ@res@step}{0pt}}
        \pgfpathclose
        \pgfusepath{draw}
      \endpgfscope
	  }
	}




\pgfcircdeclarequadpole{transformer}{

	\pgf@circ@drawtransformerbasicbody

}{\pgf@circ@drawtransformerbasicanchor}

\pgfcircdeclarequadpole{transformer core}{

	\pgf@circ@drawtransformerbasicbody
	
	\pgfmoveto{\pgfpoint%
					{\ctikzvalof{quadpoles/transformer core/core width}\pgf@circ@res@right}%
					{\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@down}%
					}
	\pgflineto{
				\pgfpoint
					{\ctikzvalof{quadpoles/transformer core/core width}\pgf@circ@res@right}%
					{\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@up}%
					}

	\pgfmoveto{\pgfpoint%
					{\ctikzvalof{quadpoles/transformer core/core width}\pgf@circ@res@left}%
					{\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@down}%
					}
	\pgflineto{
				\pgfpoint
					{\ctikzvalof{quadpoles/transformer core/core width}\pgf@circ@res@left}%
					{\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@up}%
					}					
	
	\pgfsetlinewidth{\pgfkeysvalueof{/tikz/circuitikz/bipoles/thickness}\pgflinewidth}
	\pgfusepath{draw}
}{\pgf@circ@drawtransformerbasicanchor}


\pgfcircdeclarequadpole{gyrator}{

	\def\stretto{.4}
	
	\pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}}
	\pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@up}}
	\pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@down}}
	\pgfpathlineto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@down}}
	
	\pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@up}}
	\pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@up}}
	\pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@down}}
	\pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}
	
	\pgfusepath{draw}
	
	\pgfsetlinewidth{2\pgflinewidth}
	\pgfpathmoveto{\pgfpoint{\stretto\pgf@circ@res@left}{.7*\stretto\pgf@circ@res@down}}
	\pgfpatharc{90}{270}{.7*\stretto\pgf@circ@res@down}
	
	\pgfpathmoveto{\pgfpoint{\stretto\pgf@circ@res@right}{.7*\stretto\pgf@circ@res@up}}
	\pgfpatharc{-90}{90}{.7*\stretto\pgf@circ@res@down}
	\pgfusepath{draw}

}{}

%% four-port
% defines a general outer box for four-ports
% TikZ usage: 
%		\draw (0,0) node[coupler](coup){\SI{-3}{dB}}
%		(coup.port1) to[short,-o] ++(-1,0)
%

\long\def\pgfcircdeclarefourport#1#2{
	\pgfdeclareshape{#1}{
		\anchor{center}{
			\northwest
			\pgf@x=0pt
			\pgf@y=0pt
		}
		\savedanchor\northwest{%
			\pgf@y=\pgfkeysvalueof{/tikz/circuitikz/quadpoles/#1/height}\pgf@circ@Rlen
			\pgf@y=.5\pgf@y
			\pgf@x=.5\pgf@circ@Rlen
			\pgf@x=-\pgfkeysvalueof{/tikz/circuitikz/quadpoles/#1/width}\pgf@x
			}
		\anchor{north}{
			\northwest
			\pgf@x=0pt
		}
		\anchor{south}{
			\northwest
			\pgf@x=0pt
			\pgf@y=-\pgf@y
		}
		\anchor{west}{
			\northwest
			\pgf@y=0pt
		}
		\anchor{east}{
			\northwest
			\pgf@y=0pt
			\pgf@x=-\pgf@x
		}
		\anchor{south west}{
			\northwest
			\pgf@y=-\pgf@y
		}
		\anchor{north east}{
			\northwest
			\pgf@x=-\pgf@x
		}
			\anchor{north west}{
			\northwest
		}
		\anchor{south east}{
			\northwest
			\pgf@x=-\pgf@x
			\pgf@y=-\pgf@y
		}
		\anchor{port1}{
			\northwest
			\pgf@y=-0.5\pgf@y
		}
		\anchor{port2}{
			\northwest
			\pgf@x=-\pgf@x
			\pgf@y=-0.5\pgf@y
		}
		\anchor{port3}{
			\northwest
			\pgf@x=-\pgf@x
			\pgf@y=0.5\pgf@y
		}
		\anchor{port4}{
			\northwest
			\pgf@y=0.5\pgf@y
		}
		\anchor{1}{
			\northwest
			\pgf@y=-0.5\pgf@y
		}
		\anchor{2}{
			\northwest
			\pgf@x=-\pgf@x
			\pgf@y=-0.5\pgf@y
		}
		\anchor{3}{
			\northwest
			\pgf@x=-\pgf@x
			\pgf@y=0.5\pgf@y
		}
		\anchor{4}{
			\northwest
			\pgf@y=0.5\pgf@y
		}
		
		\anchor{text}{
			\northwest
			\advance \pgf@y by 0.5\ht\pgfnodeparttextbox
			\pgf@x=-.5\wd\pgfnodeparttextbox
		}
		\backgroundpath{			
				\pgfsetcolor{\pgfkeysvalueof{/tikz/circuitikz/color}}	
			
				\northwest
				\pgf@circ@res@up = \pgf@y 
				\pgf@circ@res@down = -\pgf@y
				\pgf@circ@res@right = -\pgf@x
				\pgf@circ@res@left = \pgf@x
			
				\pgfstartlinewidth=\pgflinewidth

				% draw outer box
				\pgfsetlinewidth{\pgfkeysvalueof{/tikz/circuitikz/bipoles/thickness}\pgfstartlinewidth}
				\pgfpathrectanglecorners{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}}{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}
				\pgfusepath{draw}
				
				% draw inner stuff
				#2
				
				% draw inner text
				\pgftext[center,x=-0.15\pgf@circ@res@step,y=0]{\ctikzvalof{bipoles/twoport/text}}
		}
	}
}

% four-port
\pgfcircdeclarefourport{fourport}{}


% straight coupler
\pgfcircdeclarefourport{coupler}{
	\pgfsetlinewidth{\pgfstartlinewidth}
	\pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@up}}
	\pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
	\pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@down}}
	\pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
	\pgfusepath{draw}
	
	\pgfpathmoveto{\pgfpoint{0.7\pgf@circ@res@left}{0.4\pgf@circ@res@down}}
	\pgfpathlineto{\pgfpoint{0.7\pgf@circ@res@right}{0.4\pgf@circ@res@up}}
	\pgfsetarrows{latex-latex}
	\pgfusepath{draw}
	\pgfpathmoveto{\pgfpoint{0.7\pgf@circ@res@left}{0.4\pgf@circ@res@up}}
	\pgfpathlineto{\pgfpoint{0.7\pgf@circ@res@right}{0.4\pgf@circ@res@down}}
	\pgfsetarrows{latex-latex}
	\pgfusepath{draw}
}

% "bended" coupler
\pgfcircdeclarefourport{coupler2}{
	\pgfsetlinewidth{\pgfstartlinewidth}
	\pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@up}}
	\pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
	\pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@down}}
	\pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
	\pgfusepath{draw}
	
	\pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@left}{0pt}}
	\pgfpatharc{0}{90} {0.4\pgf@circ@res@up}
	\pgfsetarrowsend{latex}
	\pgfusepath{draw}
	\pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@left}{0pt}}
	\pgfpatharc{0}{-90} {0.4\pgf@circ@res@up}
	\pgfsetarrowsend{latex}
	\pgfusepath{draw}
	
	\pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@right}{0pt}}
	\pgfpatharc{180}{90} {0.4\pgf@circ@res@up}
	\pgfsetarrowsend{latex}
	\pgfusepath{draw}
	\pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@right}{0pt}}
	\pgfpatharc{-180}{-90} {0.4\pgf@circ@res@up}
	\pgfsetarrowsend{latex}
	\pgfusepath{draw}
	
	
}
