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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /graphics/circuit_macros/examples/Three.m4
Initial commit
Diffstat (limited to 'graphics/circuit_macros/examples/Three.m4')
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diff --git a/graphics/circuit_macros/examples/Three.m4 b/graphics/circuit_macros/examples/Three.m4
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+.PS
+# Three.m4: three-phase oscillator
+ cct_init
+
+define(`section',`[ I: Here
+ resistor(right elen_*0.75); llabel(,R/2)
+T: dot
+ line down dimen_/2 then right_ dimen_/4
+ Amp: opamp(,,,,,
+ rgbfill(0.9,0.6,0.1,line to N then to E then to S then to Here)
+ "{\scriptsize$-$}" at In1 ljust
+ "{\scriptsize$+$}" at In2 ljust
+ ) with .In1 at Here
+ line left dimen_/4 from Amp.In2 then down dimen_/4; G: ground
+ resistor(from T to (Amp.Out,T)); llabel(,R)
+O: dot
+ { arrow up dimen_*0.5 then right dimen_/4 up dimen_/4
+ "$`$1^\circ'$" above }
+ line to Amp.Out
+ dot(at T+(dimen_/4,0)); line up dimen_*0.6
+ capacitor(right_ Amp.Out.x-Here.x-dimen_/4,C); llabel(,2C)
+ line to (Here,T); dot
+ ]')
+
+A: section(0)
+B: section(120) with .I at A.O
+C: section(-120) with .I at B.O
+
+ ground(at (A.I,A.G)+(dimen_/3,0),,)
+P:potentiometer(down_ dimen_/2,,0.75,dimen_/2) with .End at Here
+ line from P.Start to (A.I,P.Start); dot
+ resistor(up_ dimen_*0.75 from P.T1)
+ line to A.T
+
+ dot(at B.Amp.Out+(dimen_/3,0)); { "$V_c$" above }
+ resistor(down_ dimen_*0.75)
+ { dot; line right (C.T.x-Here.x)/2
+ reversed(`diode',up_ dimen_)
+ line to C.T }
+ resistor(down_ dimen_*0.75)
+ dot
+ line from C.O right dimen_/4 then down C.O.y-Here.y then to (A.I,Here) \
+ then to A.I
+.PE