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From: john larkin <jl@650pot.com>
Newsgroups: sci.electronics.design
Subject: Re: Fast monostable with a transistpor array
Date: Fri, 14 Jun 2024 07:47:45 -0700
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On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:

>"Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
>> One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his mononstable 
>> and level shifter.
>>
>> It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.
>>
>> https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216
>>
>
>I put the NPN model parameters into a circuit designed by yourself.
>It's late now but I got as far as Time step too small.
>

That is neither fast nor a monostable.

There's no reason to use many-GHz parts in micropower circuits. One
reason is that the sim breaks.

I do wish people would comment Spice sims properly, with author, date,
and what-the-hell-this-actually-is-supposed-to-do.


I wonder what happened to James. I think all the flaming here drove
him away. James was fun. He always skis in short pants.



>Version 4
>SHEET 1 2848 1304
>WIRE -592 528 -752 528
>WIRE -240 528 -592 528
>WIRE -64 528 -240 528
>WIRE 32 528 -64 528
>WIRE -64 544 -64 528
>WIRE 32 560 32 528
>WIRE -592 576 -592 528
>WIRE -240 592 -240 528
>WIRE -752 624 -752 528
>WIRE -64 656 -64 624
>WIRE -592 704 -592 656
>WIRE -464 704 -592 704
>WIRE -384 704 -464 704
>WIRE -240 704 -240 672
>WIRE -240 704 -320 704
>WIRE -128 704 -240 704
>WIRE -464 736 -464 704
>WIRE -240 736 -240 704
>WIRE -752 784 -752 704
>WIRE -64 784 -64 752
>WIRE 32 784 32 640
>WIRE 32 784 -64 784
>WIRE -592 832 -592 704
>WIRE 32 832 32 784
>WIRE -512 880 -528 880
>WIRE -464 880 -464 816
>WIRE -464 880 -512 880
>WIRE -448 880 -464 880
>WIRE -384 880 -320 704
>WIRE -320 880 -384 704
>WIRE -240 880 -240 816
>WIRE -240 880 -256 880
>WIRE -208 880 -240 880
>WIRE -32 880 -208 880
>WIRE -208 912 -208 880
>WIRE -512 928 -512 880
>WIRE -592 1008 -592 928
>WIRE -512 1008 -512 992
>WIRE -512 1008 -592 1008
>WIRE -208 1008 -208 976
>WIRE 32 1008 32 928
>WIRE 32 1008 -208 1008
>WIRE -592 1040 -592 1008
>WIRE 32 1040 32 1008
>FLAG 32 1040 0
>FLAG -592 1040 0
>FLAG -752 784 0
>SYMBOL RES -608 560 R0
>SYMATTR InstName R1
>SYMATTR Value 1Meg
>SYMBOL res 16 544 R0
>SYMATTR InstName R10
>SYMATTR Value 2Meg
>SYMBOL cap -384 864 R90
>WINDOW 0 0 32 VBottom 2
>WINDOW 3 32 32 VTop 2
>SYMATTR InstName C1
>SYMATTR Value 1.5p
>SYMBOL cap -256 864 R90
>WINDOW 0 0 32 VBottom 2
>WINDOW 3 32 32 VTop 2
>SYMATTR InstName C2
>SYMATTR Value 1.5p
>SYMBOL VOLTAGE -752 608 R0
>SYMATTR InstName V1
>SYMATTR Value 5
>SYMBOL npn -32 832 R0
>SYMATTR InstName Q1
>SYMATTR Value NUHFARRY
>SYMBOL npn -528 832 M0
>SYMATTR InstName Q2
>SYMATTR Value NUHFARRY
>SYMBOL res -256 720 R0
>SYMATTR InstName R3
>SYMATTR Value 4.7Meg
>SYMBOL res -480 720 R0
>SYMATTR InstName R4
>SYMATTR Value 4.701Meg
>SYMBOL cap -528 928 R0
>SYMATTR InstName C3
>SYMATTR Value 0.68p
>SYMBOL cap -224 912 R0
>SYMATTR InstName C4
>SYMATTR Value 0.68p
>SYMBOL npn -128 656 R0
>SYMATTR InstName Q10
>SYMATTR Value NUHFARRY
>SYMBOL RES -256 576 R0
>WINDOW 3 30 76 Left 2
>SYMATTR Value 1Meg
>SYMATTR InstName R2
>SYMBOL RES -48 640 R180
>WINDOW 0 36 76 Left 2
>WINDOW 3 36 40 Left 2
>SYMATTR InstName R11
>SYMATTR Value 1Meg
>TEXT -768 1176 Left 0 !.tran 0 150u 50u startup
>TEXT -776 1112 Left 0 ;This example schematic is supplied for informational/educational purposes only.\nJuly 7, 2008 by Bill Sloman 
>(but blame the Q10 output stage on James Arthur).
>TEXT -480 1176 Left 0 !.model NUHFARRY NPN\n+ (IS = 1.840E - 16 XTI = 3.000E + 00 EG = 1.110E + 00 VAF = 7.200E + 01\n+ VAR = 4.500E 
>+ 00 BF = 1.036E + 02 ISE = 1.686E - 19 NE = 1.400E + 00\n+ IKF = 5.400E - 02 XTB = 0.000E + 00 BR = 1.000E + 01 ISC = 1.605E - 
>14\n+ NC = 1.800E + 00 IKR = 5.400E - 02 RC = 1.140E + 01 CJC = 3.980E - 13\n+ MJC = 2.400E - 01 VJC = 9.700E - 01 FC = 5.000E - 01 
>CJE = 2.400E - 13\n+ MJE = 5.100E- 01 VJE = 8.690E - 01 TR = 4.000E - 09 TF = 10.51E - 12\n+ ITF = 3.500E - 02 XTF = 2.300E + 00 VTF 
>= 3.500E + 00 PTF = 0.000E + 00\n+ XCJC = 9.000E - 01 CJS = 1.150E - 13 VJS = 7.500E - 01 MJS = 0.000E + 00\n+ RE = 1.848E + 00 RB = 
>5.007E + 01 RBM = 1.974E + 00 KF = 0.000E + 00\n+ AF = 1.000E + 00)
>TEXT 112 640 Left 0 ;Q2's collector is loaded by C2,\nlimiting risetime. Q10 isolates\nQ1's collector, allowing that node\nto charge 
>much more rapidly.\n \nQ10 doubles as a common-base\namplifier stage, further squaring up the\noutput from Q10's collector.\n \nThe 
>new output is taken from\nQ10's collector.\n \nJames Arthur, 9-Jul-2008
>