*SPICE circuit <sr_ff_use> from XCircuit v3.10

.subckt nor Y A B
M1 ext14 A Vdd Vdd pmos
M2 Y A GND GND nmos
M3 Y B GND GND nmos
M4 Y B ext14 Vdd pmos
.ends

.subckt SRflipflop S R Q !Q
X1 !Q Q S nor
X2 Q R !Q nor
.ends

X3 Set Reset Out ext7 SRflipflop
.end