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: Fri, 14 Jun 2024 17:55:10 -0400 Organization: BWH Usenet Archive (https://usenet.blueworldhosting.com) Lines: 59 Message-ID: References: <8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com> <778p6jli5d9ba92cag0pl4pcsl22qphm2s@4ax.com> Injection-Date: Fri, 14 Jun 2024 21:55:11 -0000 (UTC) Injection-Info: nnrp.usenet.blueworldhosting.com; logging-data="30119"; mail-complaints-to="usenet@blueworldhosting.com" Cancel-Lock: sha1:b3FOX3VU9KuCT+FFygoOhG3o/6A= sha256:S7CX5Z8NkTzYe0TatHfkVSh5Q/POHxbtpaDRYZkDxX8= sha1:OCc67A8R4f8BiqQMhk8TsD2YSAM= sha256:FXs5RkPg5bjX01FYoIlTqdN3quCfZdxlK3UHJ4712Oc= X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-Priority: 3 X-RFC2646: Format=Flowed; Original Bytes: 3805 "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. > >