Path: ...!weretis.net!feeder9.news.weretis.net!usenet.blueworldhosting.com!diablo1.usenet.blueworldhosting.com!nnrp.usenet.blueworldhosting.com!.POSTED!not-for-mail From: "Edward Rawde" Newsgroups: sci.electronics.design Subject: Re: Fast monostable with a transistpor array Date: Sat, 15 Jun 2024 12:23:58 -0400 Organization: BWH Usenet Archive (https://usenet.blueworldhosting.com) Lines: 196 Message-ID: References: <8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com> Injection-Date: Sat, 15 Jun 2024 16:23:59 -0000 (UTC) Injection-Info: nnrp.usenet.blueworldhosting.com; logging-data="10498"; mail-complaints-to="usenet@blueworldhosting.com" Cancel-Lock: sha1:hCpip2sSFOQjr24aw9Vf1Jl/N7Y= sha256:AGbwyfxkmg4n96deZw2LuKKD/9mM7O8/eaMmOGVft9c= sha1:wBTQjjwhdZcQ1o0z9VrrOEO9XMo= sha256:OxJIjQMbsW/dwkAFPqD3YPA+VvGD9qqsNnF8e/+CVC0= X-Newsreader: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-RFC2646: Format=Flowed; Original X-Priority: 3 X-MSMail-Priority: Normal Bytes: 8037 "legg" wrote in message news:m95r6jhkg2t0ivj4rcgommqljvb5v4ihhd@4ax.com... > On Fri, 14 Jun 2024 09:03:03 -0700, john larkin wrote: > >>On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde" >> wrote: >> >>> >>>"john larkin" wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com... >>>> On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde" >>>> wrote: >>>> >>>>>"Bill Sloman" 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. >>> >>>Yes ok it's an astable and certainly not intended to be fast. >>>It was intended only to see if the model worked. Nothing more. >> >>It doesn't work! Actually it does, see below. >> >>> >>>> >>>> There's no reason to use many-GHz parts in micropower circuits. One >>>> reason is that the sim breaks. >> >>Most versions of the HFA3046 are obsolete. The only one left at >>Digikey costs $12. It would be risky to design around that part. >>Wasn't HFA originally a Harris part? >> >>There are lots of dual (non-monolithic) diodes and bipolars and fets >>around, but the monolithic arrays are mostly gone. >> >>The duals save space, but aren't well matched so are electrically and >>thermally equivalent to buying two separate parts. >> >>I wonder if one could design really fast stuff with the HFA3046. >>Package parasitics look nasty. And the big package will force ugly PCB >>routing. You can plop a single tiny transistor wherever you want. >> >>The HFA parts are either 5 NPNs or 5 PNPs, which is also awkward. >> >> >> > > The original simulation of the astable multivibrator was intended > to demonstrate reasonable speed at low power. Yes. It's not hard to find the original posts online. > > The model was published by Intersil in 1996 in app note MM3046. > > The simulation runs if properly typeset. Thanks for pointing that out. You're absolutely right. Here is the corrected version. As usual, line breaks will need to be fixed. > > RL Version 4 SHEET 1 2848 1316 WIRE -592 512 -752 512 WIRE -240 512 -592 512 WIRE -64 512 -240 512 WIRE 32 512 -64 512 WIRE -64 528 -64 512 WIRE 32 528 32 512 WIRE -592 560 -592 512 WIRE -240 560 -240 512 WIRE -752 624 -752 512 WIRE -64 624 -64 608 WIRE 192 624 -64 624 WIRE 208 624 192 624 WIRE -64 640 -64 624 WIRE -240 688 -240 640 WIRE -128 688 -240 688 WIRE -592 704 -592 640 WIRE -464 704 -592 704 WIRE -384 704 -464 704 WIRE -240 704 -240 688 WIRE -240 704 -320 704 WIRE -464 736 -464 704 WIRE -240 736 -240 704 WIRE -64 768 -64 736 WIRE 32 768 32 608 WIRE 32 768 -64 768 WIRE -592 832 -592 704 WIRE 32 832 32 768 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 -752 1008 -752 704 WIRE -592 1008 -592 928 WIRE -592 1008 -752 1008 WIRE -512 1008 -512 992 WIRE -512 1008 -592 1008 WIRE -208 1008 -208 976 WIRE -208 1008 -512 1008 WIRE 32 1008 32 928 WIRE 32 1008 -208 1008 WIRE -752 1040 -752 1008 FLAG -752 1040 0 FLAG 192 624 out SYMBOL RES -608 544 R0 SYMATTR InstName R1 SYMATTR Value 1Meg SYMBOL res 16 512 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 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 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 -128 640 R0 SYMATTR InstName Q10 SYMATTR Value NUHFARRY SYMBOL RES -256 544 R0 WINDOW 3 30 76 Left 2 SYMATTR Value 1Meg SYMATTR InstName R2 SYMBOL RES -48 624 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R11 SYMATTR Value 1Meg ========== REMAINDER OF ARTICLE TRUNCATED ==========