Added "general" test files (from ngspice debian patch).

tests/general/diffpair.cir

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+simple differential pair - CM and DM dc sensitivity
+
+* Models:
+.model qnl npn(bf=80 rb=100 ccs=2pf tf=0.3ns tr=6ns cje=3pf cjc=2pf va=50)
+.model qnr npn(bf=80 rb=100 ccs=2pf tf=0.3ns tr=6ns cje=3pf cjc=2pf va=50)
+
+* Circuit description:
+q1 4 2 6 qnr
+q2 5 3 6 qnl
+rs1 11 2 1k
+rs2 3 1 1k
+rc1 4 8 10k
+rc2 5 8 10k
+q3 7 7 9 qnl
+q4 6 7 9 qnr
+rbias 7 8 20k
+
+* Inputs/Supplies:
+vcm 1 0 dc 0 sin(0 0.1 5meg) ac 1
+vdm 1 11 dc 0 sin(0 0.1 5meg) ac 1
+vcc 8 0 12
+vee 9 0 -12
+
+* Analysys:
+.tf v(5) vcm
+.tf v(5) vdm
+.sens v(5,4)
+
+.end

tests/general/fourbitadder.cir

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+4 bit adder
+
+* Models:
+.MODEL dmod D
+.MODEL qmod NPN(BF=75 RB=100 CJE=1PF CJC=3PF)
+
+
+.SUBCKT NAND 1 2 3 4
+* noeuds: entrees(2) sortie 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 
+* noeuds entrees(2) ,carryin, sortie, carryout, 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
+* noeuds 
+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
+
+x1 1 2 3 4 9 10 13 16 15 TWOBIT
+x2 5 6 7 8 11 12 16 14 15 TWOBIT
+.ends FOURBIT
+
+
+
+* Inputs/Supplies:
+
+vcc 99 0 DC 5V
+VIN1A 1 0 DC 0 pulse(0 3 0 10ns 10ns   10ns   50ns)
+VIN1B 2 0 DC 0 pulse(0 3 0 10ns 10ns   20ns  100ns)
+VIN2A 3 0 DC 0 pulse(0 3 0 10ns 10ns   40ns  200ns)
+VIN2B 4 0 DC 0 pulse(0 3 0 10ns 10ns   80ns  400ns)
+VIN3A 5 0 DC 0 pulse(0 3 0 10ns 10ns  160ns  800ns)
+VIN3B 6 0 DC 0 pulse(0 3 0 10ns 10ns  320ns 1600ns)
+VIN4A 7 0 DC 0 pulse(0 3 0 10ns 10ns  640ns 3200ns)
+VIN4B 8 0 DC 0 pulse(0 3 0 10ns 10ns 1280ns 6400ns)
+
+* Circuit description:
+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
+
+* Analysys:
+.tran 1ns 6ns
+.print tran v(1)
+
+
+.end
+
+ 

tests/general/mosamp.cir

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+mosamp - mos amplifier - transient
+.options acct abstol=10n  vntol=10n
+.tran 0.1us 10us
+m1  15 15  1 32 m w=88.9u  l=25.4u
+m2   1  1  2 32 m w=12.7u  l=266.7u
+m3   2  2 30 32 m w=88.9u  l=25.4u
+m4  15  5  4 32 m w=12.7u  l=106.7u
+m5   4  4 30 32 m w=88.9u  l=12.7u
+m6  15 15  5 32 m w=44.5u  l=25.4u
+m7   5 20  8 32 m w=482.6u l=12.7u
+m8   8  2 30 32 m w=88.9u  l=25.4u
+m9  15 15  6 32 m w=44.5u  l=25.4u
+m10  6 21  8 32 m w=482.6u l=12.7u
+m11 15  6  7 32 m w=12.7u  l=106.7u
+m12  7  4 30 32 m w=88.9u  l=12.7u
+m13 15 10  9 32 m w=139.7u l=12.7u
+m14  9 11 30 32 m w=139.7u l=12.7u
+m15 15 15 12 32 m w=12.7u  l=207.8u
+m16 12 12 11 32 m w=54.1u  l=12.7u
+m17 11 11 30 32 m w=54.1u  l=12.7u
+m18 15 15 10 32 m w=12.7u  l=45.2u
+m19 10 12 13 32 m w=270.5u l=12.7u
+m20 13  7 30 32 m w=270.5u l=12.7u
+m21 15 10 14 32 m w=254u   l=12.7u
+m22 14 11 30 32 m w=241.3u l=12.7u
+m23 15 20 16 32 m w=19u    l=38.1u
+m24 16 14 30 32 m w=406.4u l=12.7u
+m25 15 15 20 32 m w=38.1u  l=42.7u
+m26 20 16 30 32 m w=381u   l=25.4u
+m27 20 15 66 32 m w=22.9u  l=7.6u
+cc 7 9 40pf
+cl 66 0 70pf
+vin 21 0 pulse(0 5 1ns 1ns 1ns 5us 10us)
+vccp 15 0 dc +15
+vddn 30 0 dc -15
+vb 32 0 dc -20
+.model m nmos(nsub=2.2e15 uo=575 ucrit=49k uexp=0.1 tox=0.11u xj=2.95u
++   level=2 cgso=1.5n cgdo=1.5n cbd=4.5f cbs=4.5f ld=2.4485u nss=3.2e10
++   kp=2e-5 phi=0.6 )
+.print tran v(20) v(66)
+.plot  tran v(20) v(66)
+.end 

tests/general/mosmem.cir

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+mosmem - mos memory cell
+.width in=72
+.opt abstol=1u
+.opt acct list node
+.tran 20ns 2us
+vdd 9 0 dc 5
+vs 7 0 pulse(2 0 520ns 20ns 20ns 500ns 2000ns)
+vw 1 0 pulse(0 2 20ns 20ns 500ns 200ns)
+vwb 2 0 pulse(2 0 20ns 20ns 20ns 2000ns 2000ns)
+m1 3 1 0 0 mod w=250u l=5u
+m2 4 2 0 0 mod w=250u l=5u
+m3 9 9 3 0 mod w=5u   l=5u
+m4 9 9 4 0 mod w=5u   l=5u
+m5 5 7 3 0 mod w=50u  l=5u
+m6 6 7 4 0 mod w=50u  l=5u
+m7 5 6 0 0 mod w=250u  l=5u
+m8 6 5 0 0 mod w=250u  l=5u
+m9 9 9 5 0 mod w=5u   l=5u
+m10 9 9 6 0 mod w=5u  l=5u
+m11 8 4 0 0 mod w=250u l=5u
+m12 9 9 8 0 mod w=5u   l=5u
+.model mod nmos(vto=0.5 phi=0.7 kp=1.0e-6 gamma=1.83 lambda=0.115
++   level=1 cgso=1u cgdo=1u cbd=50p cbs=50p)
+.print dc v(5) v(6)
+.plot dc v(6)
+.plot tran v(6) v(5) v(7) v(1) v(2)
+.end

tests/general/rc.cir

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+Basic RC circuit
+r 1 2 1.0
+*l 1 2 1.0
+c 2 0 1.0
+vin 1 0  pulse (0 1) ac 1
+.tran  0.1 7.0
+*.ac dec 10 .01 10
+.plot tran  v(2) i(vin)
+*.plot ac  vdb(2) xlog
+.end

tests/general/rca3040.cir

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+rca3040 ckt - rca 3040 wideband amplifier
+.ac dec 10 1 10ghz
+.dc vin -0.25 0.25 0.005
+.tran 2.0ns 200ns
+vin 1 0 sin(0 0.1 50meg 0.5ns) ac 1
+vcc     2       0       15.0
+vee     3       0       -15.0
+rs1     30      1       1k
+rs2     31      0       1k
+r1      5       3       4.8k
+r2      6       3       4.8k
+r3      9       3       811
+r4      8       3       2.17k
+r5      8       0       820
+r6      2       14      1.32k
+r7      2       12      4.5k
+r8      2       15      1.32k
+r9      16      0       5.25k
+r10     17      0       5.25k
+q1      2       30      5       qnl
+q2      2       31      6       qnl
+q3      10      5       7       qnl
+q4      11      6       7       qnl
+q5      14      12      10      qnl
+q6      15      12      11      qnl
+q7      12      12      13      qnl
+q8      13      13      0       qnl
+q9      7       8       9       qnl
+q10     2       15      16      qnl
+q11     2       14      17      qnl
+.model qnl npn bf=80 rb=100 ccs=2pf tf=0.3ns tr=6ns cje=3pf
++ cjc=2pf va 50
+.end

tests/general/rtlinv.cir

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+rtlinv ckt - cascaded rtl inverters
+.width in=72
+.opt acct list node lvlcod=2
+.dc vin 0.0 2.5 0.025
+.tran 2ns 200ns
+vcc 6 0 5
+vin 1 0 pulse(0 5 2ns 2ns 2ns 80ns)
+rb1 1 2 10k
+rc1 6 3 1k
+q1 3 2 0 qnd
+rb2 3 4 10k
+q2 5 4 0 qnd
+rc2 6 5 1k
+.model qnd npn(bf=50 rb=70 rc=40 ccs=2pf tf=0.1ns tr=10ns cje=0.9pf
++   cjc=1.5pf pc=0.85 va=50)
+.print dc v(3) v(5)
+.plot dc v(3)
+.print tran v(3) v(5)
+.plot tran v(3) v(5) v(1)
+.end

tests/general/schmitt.cir

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+schmitt ckt - ecl compatible schmitt trigger
+.width in=72
+.opt acct list node lvlcod=2
+.tran 10ns 1000ns
+vin 1 0 pulse(-1.6 -1.2 10ns 400ns 400ns 100ns 10000ns)
+vee 8 0 -5
+rin 1 2 50
+rc1 0 3 50
+r1 3 5 185
+r2 5 8 760
+rc2 0 6 100
+re 4 8 260
+rth1 7 8 125
+rth2 7 0 85
+cload 7 0 5pf
+q1 3 2 4 qstd off
+q2 6 5 4 qstd
+q3 0 6 7 qstd
+q4 0 6 7 qstd
+.model qstd npn(is=1.0e-16 bf=50 br=0.1 rb=50 rc=10 tf=0.12ns tr=5ns
++   cje=0.4pf pe=0.8 me=0.4 cjc=0.5pf pc=0.8 mc=0.333 ccs=1pf va=50)
+.print tran v(1) v(3) v(5) v(6)
+.plot tran v(3) v(5) v(6) v(1)
+.end
+s