Path: ...!Xl.tags.giganews.com!local-1.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail NNTP-Posting-Date: Mon, 03 Jun 2024 13:59:24 +0000 From: john larkin Newsgroups: sci.electronics.design Subject: Re: fast NPN in LT Spice Date: Mon, 03 Jun 2024 06:59:23 -0700 Message-ID: References: <4n2q5jln0sb9oqbfp81jm723tbjf7tol80@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: 211 X-Trace: sv3-Bnu2xO6Fx1sf4joy3AJi/ct2NPCQhqF5h1HlK9uUwyflMcddKSLtJSY54muw/rMIT2I+4ePRIHXvsRu!r7sh12M/GN5z+f2lgxf6auedMmyxjtIpdtrLI9+mS/v6Rbd/L0RMs1FsCWeVaB+5BJClK956di5+!kc8k8A== 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: 7031 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. > >Version 4 >SHEET 1 2924 1040 >WIRE 128 -720 -768 -720 >WIRE 304 -720 128 -720 >WIRE 656 -720 304 -720 >WIRE 1088 -720 656 -720 >WIRE 1376 -720 1088 -720 >WIRE 1584 -720 1376 -720 >WIRE 1088 -576 1088 -720 >WIRE 1376 -576 1376 -720 >WIRE 128 -560 128 -720 >WIRE 304 -560 304 -720 >WIRE 656 -560 656 -720 >WIRE 1584 -544 1584 -720 >WIRE 1088 -400 1088 -496 >WIRE 1088 -400 960 -400 >WIRE 1248 -400 1088 -400 >WIRE 960 -368 960 -400 >WIRE 1248 -352 1248 -400 >WIRE 656 -320 656 -480 >WIRE 896 -320 656 -320 >WIRE 1376 -304 1376 -496 >WIRE 1376 -304 1312 -304 >WIRE 128 -288 128 -480 >WIRE 176 -288 128 -288 >WIRE 304 -288 304 -480 >WIRE 304 -288 240 -288 >WIRE 656 -208 656 -320 >WIRE 1376 -192 1376 -304 >WIRE 1584 -192 1584 -480 >WIRE 1584 -192 1376 -192 >WIRE 304 -160 304 -288 >WIRE 448 -160 304 -160 >WIRE 592 -160 448 -160 >WIRE -768 -64 -768 -720 >WIRE 128 48 128 -288 >WIRE 1376 48 1376 -192 >WIRE -272 96 -432 96 >WIRE 64 96 -192 96 >WIRE 304 160 304 -160 >WIRE 448 176 448 -160 >WIRE -432 240 -432 96 >WIRE -768 416 -768 16 >WIRE -768 416 -880 416 >WIRE -736 416 -768 416 >WIRE -432 416 -432 320 >WIRE -432 416 -736 416 >WIRE 304 416 304 240 >WIRE 304 416 -432 416 >WIRE 960 416 960 -272 >WIRE 960 416 304 416 >WIRE 1376 416 1376 128 >WIRE 1376 416 960 416 >WIRE 1424 416 1376 416 >WIRE 1520 416 1424 416 >WIRE 128 464 128 144 >WIRE 656 464 656 -112 >WIRE 656 464 128 464 >WIRE 1424 480 1424 416 >WIRE -880 496 -880 416 >WIRE 656 496 656 464 >WIRE 1248 624 1248 -256 >WIRE 1296 624 1248 624 >WIRE 1424 624 1424 560 >WIRE 1424 624 1296 624 >WIRE -736 640 -736 416 >WIRE -736 656 -736 640 >WIRE 1424 688 1424 624 >WIRE -736 944 -736 720 >WIRE 448 944 448 256 >WIRE 448 944 -736 944 >WIRE 656 944 656 576 >WIRE 656 944 448 944 >WIRE 1424 944 1424 768 >WIRE 1424 944 656 944 >WIRE 1648 944 1424 944 >FLAG -880 496 0 >FLAG 1296 624 out >SYMBOL npn 64 48 R0 >SYMATTR InstName Q1 >SYMATTR Value BFR92A >SYMBOL npn 592 -208 R0 >SYMATTR InstName Q2 >SYMATTR Value BFR92A >SYMBOL voltage -768 -80 R0 >WINDOW 123 0 0 Left 0 >WINDOW 39 24 44 Left 2 >SYMATTR SpiceLine Rser=0.1 >SYMATTR InstName V1 >SYMATTR Value 15.0 >SYMBOL voltage -736 624 R0 >WINDOW 123 0 0 Left 0 >WINDOW 39 24 44 Left 2 >SYMATTR SpiceLine Rser=0.1 >SYMATTR InstName V2 >SYMATTR Value 15.0 >SYMBOL voltage -432 224 R0 >WINDOW 123 0 0 Left 0 >WINDOW 39 0 0 Left 0 >SYMATTR InstName V3 >SYMATTR Value PULSE(0 .2 1n 300p 300p 100p 100n 2) >SYMBOL res -176 80 R90 >WINDOW 0 0 56 VBottom 2 >WINDOW 3 32 56 VTop 2 >SYMATTR InstName R1 >SYMATTR Value 27 >SYMBOL res 640 480 R0 >SYMATTR InstName R3 >SYMATTR Value 3k0 >SYMBOL res 112 -576 R0 >SYMATTR InstName R4 >SYMATTR Value 2k >SYMBOL res 288 144 R0 >SYMATTR InstName R5 >SYMATTR Value 100 >SYMBOL res 640 -576 R0 >SYMATTR InstName R6 >SYMATTR Value 1k >SYMBOL res 288 -576 R0 >SYMATTR InstName R2 >SYMATTR Value 5k >SYMBOL cap 240 -304 R90 >WINDOW 0 0 32 VBottom 2 >WINDOW 3 32 32 VTop 2 >SYMATTR InstName C1 >SYMATTR Value 10p ========== REMAINDER OF ARTICLE TRUNCATED ==========