# PSPICE - I need to create a complex door project but it doesn't accept the number of nodes

#### MarinaC

Joined Sep 29, 2016
1
Hello!

I need to do a project of an complex door only using NANDs, NORs and NOTs from the this equation: (C*!D)*(A+B). My teacher said that I need to create a subcircuit with the whole equation, and a subcircuit for a NOT. I did this, but PSPICE returned this: "ERROR(ORPSIM-15461) Incorrect number of interface nodes for X4."
What can I do? I need to use four nodes at the subcircuit.

My project:

.include ams35ps.lib

V0 gnd 0 DC 0V
V1 vcc 0 DC 3.3V

VinA A gnd pulse (0 3.3 0 0.1ns 0.1ns 2.5ns 5.2ns)
VinB B gnd pulse (0 3.3 0 0.1ns 0.1ns 5ns 10.2ns)
VinC C gnd pulse (0 3.3 0 0.1ns 0.1ns 10ns 20.2ns)
VinD D gnd pulse (0 3.3 0 0.1ns 0.1ns 20ns 40.2ns)

*** Subcircuit

.subckt COMPLEXA OUT VDD GND

**NAND 1
* Rede P - Pull UP
M1 S AN VDD VDD MODP W=60u L=0.3u
M2 S BN VDD VDD MODP W=60u L=0.3u

* Rede N - Pull Down
M3 S AN Y GND MODN W=40u L=0.3u
M4 Y BN GND GND MODN W=40u L=0.3u

** NOR
* Rede P - Pull UP
M1 Y CN 1 1 MODP W=50u L=0.3u
M2 X D Y 1 MODP W=50u L=0.3u

* Rede N - Pull Down
M3 X CN 0 0 MODN W=13u L=0.3u
M4 X D 0 0 MODN W=13u L=0.3u

**NAND 2
* Rede P - Pull UP
M1 OUT S VDD VDD MODP W=60u L=0.3u
M2 OUT X VDD VDD MODP W=60u L=0.3u

* Rede N - Pull Down
M3 OUT S Y GND MODN W=40u L=0.3u
M4 OUT X GND GND MODN W=40u L=0.3u

.ends COMPLEXA

**-------------------------------------

* SubcircuitNOT

.subckt INV IN OUT VDD GND
M1 OUT IN VDD VDD MODP W=50u L=0.3u
M2 OUT IN GND GND MODN W=30u L=0.3u
.ends INV

* -------------------------------

* Invert:

X1 A AN vcc gnd INV

X2 B BN vcc gnd INV

X3 C CN vcc gnd INV

* -------------------------------

* Use complex door: (The error warning indicates this line)

X4 AN BN CN D S_1 vcc gnd COMPLEXA

* -------------------------------

X5 S_1 S_2 vcc gnd INV

* -------------------------------

C1 S_2 0 0.1pF

.tran 0.001ns 50ns

Thank you!

#### Papabravo

Joined Feb 24, 2006
20,626
I should think it would be fairly obvious that on your invocation line you have more signals (7) than on your definition line (3). Don't they have to be the same?