Path: ...!Xl.tags.giganews.com!local-1.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail NNTP-Posting-Date: Sat, 15 Jun 2024 14:49:13 +0000 From: john larkin Newsgroups: sci.electronics.design Subject: Re: Fast monostable with a transistpor array Date: Sat, 15 Jun 2024 07:49:13 -0700 Message-ID: <3dar6jdj2smds9m4qjonv1gomljil2hrof@4ax.com> References: <8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com> <778p6jli5d9ba92cag0pl4pcsl22qphm2s@4ax.com> User-Agent: ForteAgent/8.00.32.1272 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 214 X-Trace: sv3-pckx33AMsYYTW4zmKV6RYeewh9Qa/qT4rbZCtd2+5+/Q9I0Zyv21z4+S82N3teAV6YJ2IrwrK8Adh+V!hmWzht4lZCuWHHJiZH16jPsjZqkxg713YS1WeT2BaIOreZ/bWVq84EV+lwUun9bgCiD2TVXXaTMU!3Ol51w== X-Complaints-To: www.supernews.com/docs/abuse.html X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 9297 On Fri, 14 Jun 2024 23:41:13 -0400, "Edward Rawde" wrote: >"john larkin" wrote in message news:jijp6jd83gito3ovhb9imlipp5str2ln9p@4ax.com... >> On Fri, 14 Jun 2024 17:55:10 -0400, "Edward Rawde" >> wrote: >> >>>"john larkin" wrote in message news:778p6jli5d9ba92cag0pl4pcsl22qphm2s@4ax.com... >>>> On Fri, 14 Jun 2024 15:50:31 -0400, "Edward Rawde" >>>> wrote: >>>> >>>>>"piglet" wrote in message news:v4i0ev$304v8$1@dont-email.me... >>>>>> On 14/06/2024 17:03, 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! >>>>>>> >>>>>> >>>>>> Yeah, there is something very wrong with that transistor model. >>>>>> >>>>>> Here is an emitter coupled multivib that can run fast. Should be possible somehow to gate it into being a monostable - worst >>>>>> case >>>>>> wrap a latch around it so it runs just one pulse? >>>>>> >>>>> >>>>>Now we're getting somewhere. Thanks piglet. 2SC3838K typical ft 3.2 GHz and available. >>>>>However it's not recommended for new designs if you believe the rohm site. >>>>>So I wonder if it has a successor which is available. >>>>> >>>>>NSVF6001SB6T1G looks interesting but no sign of a model other than symbol, footprint and 3D that I can find. >>>>> >>>> >>>> I like BFS17. It's fast, but not so fast as to get cranky. It >>>> generally behaves. >>> >>>But looks like it's going obsolete. 55GN01FA is on the list of alternatives. >>> >>>> >>>> >>> >> >> Digikey shows two active sources. My inventory program shows MMBTH10 >> as an alternate. >> >> Mouser has a million BFS17s in stock. > >Ok well let's hope the likes of Musk doesn't need them. > >The rest of us might need a part which, as far as I can tell, doesn't have any signs of pending obsolescence. Small rocks maybe. > >To that end I went hunting for models of the 55GN01FA and managed to find the file 55GN01FA.mps which contains the PS (P Spice?) >parameter set. >After downloading another file (image) to make sure I knew my Yottas from my yoctos I converted that file to a model which is >accepted by LTSpice > >Some model parameters were not accepted by LTSpice so they were removed. Namely LE LB LC Cbe Cbc Cce cc and Q1.AREA > >The result was as follows. > >The point of this is to test the 55GN01FA model. No-one is claiming that this is a monostable or that it is fast. > >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 -592 576 -592 512 >WIRE -240 592 -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 -240 672 >WIRE -128 688 -240 688 >WIRE -592 704 -592 656 >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 -752 784 -752 704 >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 -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 >FLAG 192 624 out >SYMBOL RES -608 560 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 >SYMATTR InstName V1 >SYMATTR Value 5 >SYMBOL npn -32 832 R0 >SYMATTR InstName Q1 >SYMATTR Value 55GN01FA >SYMBOL npn -528 832 M0 >SYMATTR InstName Q2 >SYMATTR Value 55GN01FA >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 ========== REMAINDER OF ARTICLE TRUNCATED ==========