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From: Bill Sloman <bill.sloman@ieee.org>
Newsgroups: sci.electronics.design
Subject: Re: fast NPN in LT Spice
Date: Tue, 4 Jun 2024 00:10:32 +1000
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On 3/06/2024 11:59 pm, john larkin wrote:
> On Mon, 3 Jun 2024 17:18:15 +1000, Bill Sloman <bill.sloman@ieee.org>
> wrote:
> 
>> On 3/06/2024 1:22 pm, john larkin wrote:
>>> On Sun, 2 Jun 2024 20:35:02 -0400, "Edward Rawde"
>>> <invalid@invalid.invalid> wrote:
>>>
>>>> "john larkin" <jl@650pot.com> wrote in message news:4n2q5jln0sb9oqbfp81jm723tbjf7tol80@4ax.com...
>>>>> On Sun, 2 Jun 2024 19:46:14 -0400, "Edward Rawde"
>>>>> <invalid@invalid.invalid> wrote:
>>>>>
>>>>>> "john larkin" <jl@650pot.com> 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