* Ideal transformer w/ central tap test deck

** ideal transformer 3 - two output windings
.SUBCKT IT2WDG 1 2 3 4 5 6 Np=1 Ns1=1 Ns2=1
* 1 in+
* 2 in-
* 3 out1+
* 4 out1-
* 5 out2+
* 6 out2-
F1 3 4 E1  { -Np/Ns1 }
E1 1 x 3 4 { +Np/Ns1 }
F2 5 6 E2  { -Np/Ns2 }
E2 y 2 5 6 { +Np/Ns2 }
R1 x 2 1m
R2 1 y 1m
.ENDS IT2WDG

VSIG 1 0 DC 100uV SIN(0 5 5000.0 0.0 0.0 0.0)
R0   1 2 1.0
R1   3 0 100.0
R2   4 0 100.0   
XT1  2 0 3 0 4 0 IT2WDG Np=1 Ns1=2 Ns2=4

.OPTIONS METHOD=GEAR
.TRAN 1u 1ms 0 1u UIC

.control
* run
* write transformer-ctap.raw
* quit
run
* plot v(sig) v(in+) v(out1+) v(out2+) i(v(sig))
plot v(1) v(2) v(3) v(4) i(vsig)
.endc

.end