Path: ...!weretis.net!feeder8.news.weretis.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Bill Sloman Newsgroups: sci.electronics.design Subject: Re: fast NPN in LT Spice Date: Tue, 4 Jun 2024 00:10:32 +1000 Organization: A noiseless patient Spider Lines: 56 Message-ID: References: <4n2q5jln0sb9oqbfp81jm723tbjf7tol80@4ax.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Mon, 03 Jun 2024 16:10:33 +0200 (CEST) Injection-Info: dont-email.me; posting-host="e1fda1ec3d2b12296ec6c735d129fb70"; logging-data="4130383"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18y0JwIMV7/QJ3Gbx+AOpwWmG6lpznbhz4=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:uJSQatCzA66KZaYlsBGFHtH9mLY= Content-Language: en-US In-Reply-To: Bytes: 3301 On 3/06/2024 11:59 pm, john larkin wrote: > On Mon, 3 Jun 2024 17:18:15 +1000, Bill Sloman > wrote: > >> On 3/06/2024 1:22 pm, john larkin wrote: >>> On Sun, 2 Jun 2024 20:35:02 -0400, "Edward Rawde" >>> wrote: >>> >>>> "john larkin" wrote in message news:4n2q5jln0sb9oqbfp81jm723tbjf7tol80@4ax.com... >>>>> On Sun, 2 Jun 2024 19:46:14 -0400, "Edward Rawde" >>>>> wrote: >>>>> >>>>>> "john larkin" wrote in message news:eqsp5jde87vqs6du4a7djoalag7kpkuhkr@4ax.com... >>>>>>> There are many NPNs in the standard LT Spice library. >>>>>>> >>>>>>> Does anyone know of a fast, RF type, transistor? It's hard to tell >>>>>>> from the jillion lines of fine-print parameters. >>>>>> >>>>>> https://www.google.com/search?q=".model+BFR92A" >>>>>> >>>>>>> >>>>>>> I want to make a model of the MC10EP89 gate. >>>>>>> >>>>>> >>>>> >>>>> That doesn't seem to be in the LT Spice library. >>>>> >>>>> 2SC3838K looks OK. >>>>> >>>>> It's hard to pick parts, discrete or ICs, from the library. >>>> >>>> Yes it would be nice if a description of the part as well as the part number could be included. >>> >>> A sortable column of Ft would be nice for transistors. Lacking that, >>> sorting on Vce helps spot the RF parts. Low voltage suggests RF. >> >> >> Here's a circuit that includes a 5GHz ft BFR92A, which a typical >> broad-band transistor. I had to put in the Spice model into the .asc >> file myself. >> >> There used to be quite a few of them around, but - as Phil Hobbs has >> mentioned - most of them have gone obsolete. He has tracked down a >> surviving PNP equivalent, but you won't need that to simulate ECL. >> >> It's not the first time I've posted such a .asc file here. > > Gosh, what a hideous mess, in many respects. Do tell us why. You do claim to revel in electronic discussion. -- Bill Sloman, Sydney