diff options
Diffstat (limited to 'Windows/spice/examples/digital/adder_behav.cir')
| -rw-r--r-- | Windows/spice/examples/digital/adder_behav.cir | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/Windows/spice/examples/digital/adder_behav.cir b/Windows/spice/examples/digital/adder_behav.cir new file mode 100644 index 00000000..945c88e7 --- /dev/null +++ b/Windows/spice/examples/digital/adder_behav.cir @@ -0,0 +1,69 @@ + ADDER - 4 BIT ALL-74HC00-GATE BINARY ADDER + * behavioral gate description + +*** SUBCIRCUIT DEFINITIONS +.include 74HCng_short_2.lib +.param vcc=3 tripdt=6n + +.SUBCKT ONEBIT 1 2 3 4 5 6 +* NODES: INPUT(2), CARRY-IN, OUTPUT, CARRY-OUT, VCC +X1 1 2 7 6 0 74HC00 +X2 1 7 8 6 0 74HC00 +X3 2 7 9 6 0 74HC00 +X4 8 9 10 6 0 74HC00 +X5 3 10 11 6 0 74HC00 +X6 3 11 12 6 0 74HC00 +X7 10 11 13 6 0 74HC00 +X8 12 13 4 6 0 74HC00 +X9 11 7 5 6 0 74HC00 +.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) + +.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 |