diff options
Diffstat (limited to 'Windows/spice/examples/digital/adder_mos.cir')
| -rw-r--r-- | Windows/spice/examples/digital/adder_mos.cir | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/Windows/spice/examples/digital/adder_mos.cir b/Windows/spice/examples/digital/adder_mos.cir new file mode 100644 index 00000000..3dd57434 --- /dev/null +++ b/Windows/spice/examples/digital/adder_mos.cir @@ -0,0 +1,79 @@ + ADDER - 4 BIT ALL-NAND-GATE BINARY ADDER + +*** SUBCIRCUIT DEFINITIONS +.SUBCKT NAND in1 in2 out VDD +* NODES: INPUT(2), OUTPUT, VCC +M1 out in2 Vdd Vdd p1 W=7.5u L=0.35u pd=13.5u ad=22.5p ps=13.5u as=22.5p +M2 net.1 in2 0 0 n1 W=3u L=0.35u pd=9u ad=9p ps=9u as=9p +M3 out in1 Vdd Vdd p1 W=7.5u L=0.35u pd=13.5u ad=22.5p ps=13.5u as=22.5p +M4 out in1 net.1 0 n1 W=3u L=0.35u pd=9u ad=9p ps=9u as=9p +.ENDS NAND + +.SUBCKT ONEBIT 1 2 3 4 5 6 +* NODES: INPUT(2), CARRY-IN, OUTPUT, CARRY-OUT, VCC +X1 1 2 7 6 NAND +X2 1 7 8 6 NAND +X3 2 7 9 6 NAND +X4 8 9 10 6 NAND +X5 3 10 11 6 NAND +X6 3 11 12 6 NAND +X7 10 11 13 6 NAND +X8 12 13 4 6 NAND +X9 11 7 5 6 NAND +.ENDS ONEBIT + +.SUBCKT TWOBIT 1 2 3 4 5 6 7 8 9 +* NODES: INPUT - BIT0(2) / BIT1(2), OUTPUT - BIT0 / BIT1, +* CARRY-IN, CARRY-OUT, VCC +X1 1 2 7 5 10 9 ONEBIT +X2 3 4 10 6 8 9 ONEBIT +.ENDS TWOBIT + +.SUBCKT FOURBIT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 +* NODES: INPUT - BIT0(2) / BIT1(2) / BIT2(2) / BIT3(2), +* OUTPUT - BIT0 / BIT1 / BIT2 / BIT3, CARRY-IN, CARRY-OUT, VCC +X1 1 2 3 4 9 10 13 16 15 TWOBIT +X2 5 6 7 8 11 12 16 14 15 TWOBIT +.ENDS FOURBIT + +*** POWER +VCC 99 0 DC 3.3V + +*** ALL INPUTS +VIN1A 1 0 DC 0 PULSE(0 3 0 5NS 5NS 20NS 50NS) +VIN1B 2 0 DC 0 PULSE(0 3 0 5NS 5NS 30NS 100NS) +VIN2A 3 0 DC 0 PULSE(0 3 0 5NS 5NS 50NS 200NS) +VIN2B 4 0 DC 0 PULSE(0 3 0 5NS 5NS 90NS 400NS) +VIN3A 5 0 DC 0 PULSE(0 3 0 5NS 5NS 170NS 800NS) +VIN3B 6 0 DC 0 PULSE(0 3 0 5NS 5NS 330NS 1600NS) +VIN4A 7 0 DC 0 PULSE(0 3 0 5NS 5NS 650NS 3200NS) +VIN4B 8 0 DC 0 PULSE(0 3 0 5NS 5NS 1290NS 6400NS) + +*** DEFINE NOMINAL CIRCUIT +X1 1 2 3 4 5 6 7 8 9 10 11 12 0 13 99 FOURBIT + +.option noinit acct +.TRAN 500p 6400NS +* save inputs +.save V(1) V(2) V(3) V(4) V(5) V(6) V(7) V(8) + +* use BSIM3 model with default parameters +.model n1 nmos level=49 version=3.3.0 +.model p1 pmos level=49 version=3.3.0 +*.include ./Modelcards/modelcard32.nmos +*.include ./Modelcards/modelcard32.pmos + +.control +pre_set strict_errorhandling +unset ngdebug +*save outputs and specials +save x1.x1.x1.7 V(9) V(10) V(11) V(12) V(13) +run +rusage +* plot the inputs, use offset to plot on top of each other +plot v(1) v(2)+4 v(3)+8 v(4)+12 v(5)+16 v(6)+20 v(7)+24 v(8)+28 +* plot the outputs, use offset to plot on top of each other +plot v(9) v(10)+4 v(11)+8 v(12)+12 v(13)+16 +.endc + +.END |