Re: Fast monostable with a transistor array

On 23/06/2024 10:29 pm, Chris Jones wrote:

On 19/06/2024 8:17 pm, Bill Sloman wrote:

On 19/06/2024 1:28 am, john larkin wrote:

On Tue, 18 Jun 2024 13:48:58 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
>

john larkin <jl@650pot.com> wrote:

On Tue, 18 Jun 2024 18:44:37 +1000, Bill Sloman <bill.sloman@ieee.org>
wrote:
>

On 14/06/2024 1:20 am, Bill Sloman wrote:

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
>
Two of the NPN parts could make up my emitter-coupled monostable, and
the two PNP parts could level shift the output.
>
The Renesas website offers Spice models for both the NPN and the PNP
transistors, which one could plug into an LTSpice simulation, at the
cost of making it look too messy for the more sensitive designers to be
able to look at.

>
I've spent that last four days in hospital with Covid-19 of the colon -
dramatic when it started but tedious thereafter.
>
This thread hasn't gone all that well. John Larkin has ignored the fact
that I was talking about just the 3096. There have been some sensible
comments, but I'm still too sick to try and provide any kind of summing
up of the sensible bits.
>
-- Bill Sloman, Sydney

>
OK, we can defer discussing your one-shot circuit until you feel
better. I've had some medical adventures of my own.

>
My sympathies to both of you, coincidentally I am just getting back on my
feet after an eight day common cold from hell (was not Covid)

>
I'm now wearing a 24-hour recording EKG thing. It's really no trouble
at all. Pretty cool technology.

>
And they have been around for at least thirty years. My mother got stuck with being a guineau pig for one some thirty years ago.
>

It's a pity that there is no low-drama equivalent for blood pressure

You do have to compress the upper arm.
>

 FYI if you want to avoid getting covid again, it appears to be pretty much exclusively airborne, so you probably won't get infected if you (and your family if any) wear a respirator that fits you well, every time you are indoors with people not from your household

The best way of not getting Covid is to get vaccinated against it, and I've done that in spades. Wearing a face mask cuts the odds even further.
I probably got infected at my brother's house, when I was having dinner there with his wife and a cousin from half-way across Australia. My grand-niece who showed up briefly during the evening was the most likely vector - she's certainly infected her grandmother in the last couple of years.
Getting paranoid about getting infected isn't a realistic option.
<snip>

 I haven't been sick at all since 2019, unless you count hangovers or headaches from staying up too late. The main downside is that I can't eat inside restaurants, so I order take-away instead. That seems like a good deal to me, but others have different priorities from which I will not attempt to dissuade them at present.

This was my first dose of Covid. Because it got to my gut, it was fairly dramatic, and somewhat debilitating, but it looks as if I'm going to survive.
--
Bill Sloman
--
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