Probably old news. This full version seems to have an incredible repertoire of functionality that makes anything else look childish. A good program for those who insist on beating the system to death with simulation:
On Sat, 11 Jan 2020 17:24:59 -0500, "Tom Del Rosso" wrote:
For a discrete, I use a similar LT Spice library part, or in extreme cases, roll my own.
I generally use the Universal Opamp and tweak the parameters to match whatever opamp I plan to use.
Some other semi makers, like EPC and Cree, actually supply working LT Spice models and circuits. Others provide instructions to adapt their models to LT.
Here's the simulation of a control loop to start up and current-regulate the power to a $200 Hittite 22 GHz distributed amplifier. The 2N3055 and such approximate the DC behavior of the amp, which has no available Spice model.
SYMBOL res 880 96 R0 WINDOW 0 42 47 Left 2 WINDOW 3 43 76 Left 2 SYMATTR InstName R2 SYMATTR Value 50m SYMBOL cap 1008 0 R0 WINDOW 0 -37 11 Left 2 WINDOW 3 -35 46 Left 2 SYMATTR InstName C2
SYMBOL cap 128 0 R0 WINDOW 0 59 23 Left 2 WINDOW 3 59 54 Left 2 SYMATTR InstName C3
SYMBOL res -144 -80 M90 WINDOW 0 65 61 VBottom 2 WINDOW 3 68 59 VTop 2 SYMATTR InstName R3 SYMATTR Value 20 SYMBOL voltage -288 -16 R0 WINDOW 0 50 49 Left 2 WINDOW 3 49 76 Left 2 SYMATTR InstName V2 SYMATTR Value 24 SYMBOL res -176 -16 R0 WINDOW 0 49 72 Left 2 WINDOW 3 52 106 Left 2 SYMATTR InstName R4 SYMATTR Value 5k SYMBOL pnp -96 224 R180 WINDOW 0 115 66 Left 2 WINDOW 3 93 31 Left 2 SYMATTR InstName Q2 SYMATTR Value BC857C SYMBOL res -176 304 R0 WINDOW 0 68 41 Left 2 WINDOW 3 54 74 Left 2 SYMATTR InstName R5 SYMATTR Value 2.94K SYMBOL cap -272 320 R0 WINDOW 0 -51 15 Left 2 WINDOW 3 -49 45 Left 2 SYMATTR InstName C4
SYMBOL res 688 -16 R0 WINDOW 0 59 28 Left 2 WINDOW 3 59 68 Left 2 SYMATTR InstName R1 SYMATTR Value 1K SYMBOL res 688 176 R0 WINDOW 0 53 38 Left 2 WINDOW 3 44 71 Left 2 SYMATTR InstName R7 SYMATTR Value 10.7K SYMBOL cap 528 192 R0 WINDOW 0 62 22 Left 2 WINDOW 3 63 51 Left 2 SYMATTR InstName C5
SYMBOL npn 368 176 R0 WINDOW 0 76 29 Left 2 WINDOW 3 50 59 Left 2 SYMATTR InstName Q1 SYMATTR Value BC847A SYMBOL Opamps\\UniversalOpamp2 576 688 R0 WINDOW 0 -74 -87 Left 2 SYMATTR InstName U2 SYMBOL voltage -80 576 R0 WINDOW 0 72 45 Left 2 WINDOW 3 61 73 Left 2 SYMATTR InstName V3 SYMATTR Value -6.5 SYMBOL res 576 528 R90 WINDOW 0 -43 56 VBottom 2 WINDOW 3 -34 54 VTop 2 SYMATTR InstName R9 SYMATTR Value 0 SYMBOL cap 672 528 R90 WINDOW 0 -42 31 VBottom 2 WINDOW 3 -35 30 VTop 2 SYMATTR InstName C6
SYMBOL res 352 656 R90 WINDOW 0 62 50 VBottom 2 WINDOW 3 69 54 VTop 2 SYMATTR InstName R10 SYMATTR Value 100K SYMBOL res 880 528 R90 WINDOW 0 -42 54 VBottom 2 WINDOW 3 -34 52 VTop 2 SYMATTR InstName R11 SYMATTR Value 2K SYMBOL res 944 688 R180 WINDOW 0 -65 44 Left 2 WINDOW 3 -56 13 Left 2 SYMATTR InstName R12 SYMATTR Value 1K SYMBOL res 944 512 R180 WINDOW 0 -57 72 Left 2 WINDOW 3 -51 38 Left 2 SYMATTR InstName R13 SYMATTR Value 5K SYMBOL res 352 528 R90 WINDOW 0 62 49 VBottom 2 WINDOW 3 65 54 VTop 2 SYMATTR InstName R14 SYMATTR Value 325K SYMBOL diode 272 848 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D2 SYMATTR Value 1N914 SYMBOL res 320 208 R90 WINDOW 0 -54 54 VBottom 2 WINDOW 3 -41 54 VTop 2 SYMATTR InstName R6 SYMATTR Value 10K SYMBOL res 192 816 R90 WINDOW 0 68 54 VBottom 2 WINDOW 3 78 55 VTop 2 SYMATTR InstName R16 SYMATTR Value 50K SYMBOL voltage 1264 384 R0 WINDOW 0 51 47 Left 2 WINDOW 3 52 77 Left 2 SYMATTR InstName Vthr SYMATTR Value 1.7 SYMBOL npn 1376 320 R0 WINDOW 0 -29 -55 Left 2 WINDOW 3 -54 -20 Left 2 SYMATTR InstName Q3 SYMATTR Value 2N3055 SYMBOL res 1424 480 R0 WINDOW 0 -58 68 Left 2 WINDOW 3 -42 102 Left 2 SYMATTR InstName R15 SYMATTR Value 1 SYMBOL e 1264 512 R0 WINDOW 0 -68 -18 Left 2 WINDOW 3 -63 7 Left 2 SYMATTR InstName E1 SYMATTR Value 1 SYMBOL voltage 720 864 R0 WINDOW 0 71 63 Left 2 WINDOW 3 28 103 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName Vtest SYMATTR Value SINE(-3.25 3.25 2) SYMBOL res 736 848 R180 WINDOW 0 -70 67 Left 2 WINDOW 3 -67 35 Left 2 SYMATTR InstName R8 SYMATTR Value 1g SYMBOL PowerProducts\\LT317A 432 -64 R0 WINDOW 0 -78 130 Bottom 2 WINDOW 3 -114 144 Left 2 SYMATTR InstName U3 TEXT 192 440 Left 2 !.tran 1 TEXT 64 368 Left 2 ;T130 Amp Current Control Loop TEXT 136 400 Left 2 ;JL Jan 10 2020 TEXT -120 296 Left 2 ;3.1V at 300 mA TEXT 1000 568 Left 2 ;-2.5 to -0.5 TEXT 1184 832 Left 2 ;HMC998 DC MODEL TEXT 1176 880 Left 2 ;1 A/V threshold -1V TEXT 472 632 Left 2 ;OPA197 TEXT 824 88 Left 2 ;Tant TEXT 1096 768 Left 2 ;=======================
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John Larkin Highland Technology, Inc trk
jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
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