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.PS
# Bridge.m4
cct_init
linewid = 1.5
down_
AC: source(up_ elen_,S)
line right_ elen_
dlen = linewid*2/3
Bridge: [
N: Here; S: Here+(0,-2*dlen); E: N+(dlen,-dlen); W: N+(-dlen,-dlen)
diode(from N to E)
diode(from S to E)
diode(from W to N)
diode(from W to S)
] at (Here,AC)
line from Bridge.N to last line.end
line from Bridge.S to (Bridge.S,AC.start)
Gr: line to AC.start
line from Bridge.E right_ dlen
G: gap(down_ Bridge.ht/2+dimen_/4,1); llabel(+,,-)
line from Bridge.W left_ dlen/4
crossover(to (Here,G.end),,Gr)
line to G.end chop 0 chop dotrad_
[ L: line right_ linewid/3
sinusoid( linewid/6,twopi_/linewid*4,-pi_/2,0,linewid/8) with .End at L
sinusoid( linewid/6,twopi_/linewid*4,-pi_/2,0,linewid/8) with .Start at L
] at G
R: resistor(down_ G.len from G.start+(dimen_/2,0)); llabel(,R)
arrow wid arrowwid*2 from R.start to 0.5<R.start,G.start>
arrow wid arrowwid*2 from R.end to 0.5<R.end,G.end>
.PE
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