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update docs about parametrized subcircuits, add braces around parameters (some ngspice version require them, some other can live without for simple non expression params), Update text example comp_ngspice.sch

This commit is contained in:
stefan schippers 2023-07-13 21:13:56 +02:00
parent ff66a48df0
commit 19fbba5c60
4 changed files with 10 additions and 5 deletions
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7
doc/xschem_man/subckt_with_parameters.html
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@ -31,6 +31,9 @@ p{padding: 15px 30px 10px;}
<li>ROUT: the output resistance.</li>
<li>COUT: the output capacitance. Together with ROUT defines a RC time constant (dominant pole).</li>
</ul>
<p> Parameters and expressions should be enclosed in curly braces or single quotes:<br>
<kbd>value={ROUT}</kbd> or <kbd>value='ROUT'</kbd>
</p>
<p>
The image below shows the circuit. A 'B' voltage-type source with an hyperbolic tangent
function is used because it has continuous derivative and a realistic shape.
@ -107,8 +110,8 @@ x1 REFD DRIVED IN comp_ngspice OFFSET=5 AMPLITUDE=10 GAIN=100 ROUT=1000 COUT=1p
*.ipin MINUS
*.opin OUT
B1 IOUT 0 V = {OFFSET + AMPLITUDE/2*(tanh(V(IPLUS,IMINUS)*GAIN*2/AMPLITUDE))}
R1 OUT IOUT ROUT m=1
C3 OUT 0 COUT m=1
R1 OUT IOUT {ROUT} m=1
C3 OUT 0 {COUT} m=1
V1 IPLUS PLUS 0
.save i(v1)
V2 IMINUS MINUS 0

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doc/xschem_man/subckt_with_parameters01.png
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doc/xschem_man/subckt_with_parameters02.png
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8
xschem_library/ngspice/comp_ngspice.sch
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@ -1,4 +1,4 @@
v {xschem version=3.4.0 file_version=1.2
v {xschem version=3.4.1 file_version=1.2
}
G {}
K {}
@ -9,6 +9,8 @@ T {( @#0:resolved_net )} 440 -265 0 1 0.2 0.2 {name=l2 layer=15}
T {( @#0:resolved_net )} 100 -285 0 1 0.2 0.2 {name=p1 layer=15}
T {( @#0:resolved_net )} 100 -235 0 1 0.2 0.2 {name=p2 layer=15}
T {( @#0:resolved_net )} 690 -265 0 1 0.2 0.2 {name=p3 layer=15}
T {( @#0:resolved_net )} 250 -285 0 1 0.2 0.2 {name=l6 layer=15}
T {( @#0:resolved_net )} 250 -235 0 1 0.2 0.2 {name=l1 layer=15}
N 450 -240 450 -180 { lab=IOUT}
N 450 -240 540 -240 { lab=IOUT}
N 600 -240 680 -240 { lab=OUT}
@ -23,8 +25,8 @@ C {bsource.sym} 450 -150 0 1 {name=B1 VAR=V FUNC="\{OFFSET + AMPLITUDE/2*(tanh(V
}
C {title.sym} 160 -30 0 0 {name=l3 author="Stefan Schippers"}
C {res.sym} 570 -240 1 0 {name=R1
value='ROUT'
value=\{ROUT\}
m=1}
C {parax_cap.sym} 630 -230 0 0 {name=C3 gnd=0 value='COUT' m=1}
C {parax_cap.sym} 630 -230 0 0 {name=C3 gnd=0 value=\{COUT\} m=1}
C {vsource.sym} 150 -260 1 0 {name=V1 value=0}
C {vsource.sym} 150 -210 1 0 {name=V2 value=0}