diff options
Diffstat (limited to 'Windows/spice/examples/digital/adder_bip.cir')
| -rw-r--r-- | Windows/spice/examples/digital/adder_bip.cir | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/Windows/spice/examples/digital/adder_bip.cir b/Windows/spice/examples/digital/adder_bip.cir new file mode 100644 index 00000000..fc316220 --- /dev/null +++ b/Windows/spice/examples/digital/adder_bip.cir @@ -0,0 +1,88 @@ + ADDER - 4 BIT ALL-NAND-GATE BINARY ADDER + +*** SUBCIRCUIT DEFINITIONS +.SUBCKT NAND 1 2 3 4 +* NODES: INPUT(2), OUTPUT, VCC +Q1 9 5 1 QMOD +D1CLAMP 0 1 DMOD +Q2 9 5 2 QMOD +D2CLAMP 0 2 DMOD +RB 4 5 4K +R1 4 6 1.6K +Q3 6 9 8 QMOD +R2 8 0 1K +RC 4 7 130 +Q4 7 6 10 QMOD +DVBEDROP 10 3 DMOD +Q5 3 8 0 QMOD +.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 + +*** DEFINE NOMINAL CIRCUIT +.MODEL DMOD D +.MODEL QMOD NPN(BF=75 RB=100 CJE=1PF CJC=3PF) +VCC 99 0 DC 5V +VIN1A 1 0 PULSE(0 3 0 10NS 10NS 10NS 50NS) +VIN1B 2 0 PULSE(0 3 0 10NS 10NS 20NS 100NS) +VIN2A 3 0 PULSE(0 3 0 10NS 10NS 40NS 200NS) +VIN2B 4 0 PULSE(0 3 0 10NS 10NS 80NS 400NS) +VIN3A 5 0 PULSE(0 3 0 10NS 10NS 160NS 800NS) +VIN3B 6 0 PULSE(0 3 0 10NS 10NS 320NS 1600NS) +VIN4A 7 0 PULSE(0 3 0 10NS 10NS 640NS 3200NS) +VIN4B 8 0 PULSE(0 3 0 10NS 10NS 1280NS 6400NS) +X1 1 2 3 4 5 6 7 8 9 10 11 12 0 13 99 FOURBIT +RBIT0 9 0 1K +RBIT1 10 0 1K +RBIT2 11 0 1K +RBIT3 12 0 1K +RCOUT 13 0 1K + +*** (FOR THOSE WITH MONEY (AND MEMORY) TO BURN) +.option noinit acct +.TRAN 1NS 6400NS +*.save VIN1A VIN1B VIN2A VIN2B VIN3A VIN3B VIN4A VIN4B +* save inputs +.save V(1) V(2) V(3) V(4) V(5) V(6) V(7) V(8) +* save outputs +.save V(9) V(10) V(11) V(12) V(13) +*.options savecurrents +*.save alli + +.control +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 + + |