[ExI] Electronic Circuit Question

[Lee Corbin]

Dear Ed McHale,

Thanks very much for following up on this. Stathis has also
suggested that with such software he's been able to duplicate
the experiment that was suggested by my description.

Unfortunately I did not quite describe the circuit as accurately
as I could have; I also got some other help meantime, and am
near a solution. I'm anxious to print out your diagrams which
I can't make out very well on my home system. More later
when I have more time, probably later today. Also, I should
have said pages 54-55 of H&H, (First Edition), in the 
section entitled "Emitter Follower".

Thanks again

Yours,
Lee

----- Original Message ----- 
From: "Ed McHale" <ejpmj at yahoo.com>
To: "Lee Corbin" <lcorbin at rawbw.com>; "ExI chat list" <extropy-chat at lists.extropy.org>
Sent: Tuesday, March 04, 2008 5:35 AM
Subject: Re: [ExI] Electronic Circuit Question


> Hi,
> This is my first post to this group, although I have
> lurked for a while.
> Lee, as far as I can tell your original intuition
> about what this circuit should do was correct,
> assuming that I understood your description correctly.
> My edition of Horowitz and Hill has no circuit such as
> you describe on page 56.
> One way to explore this and other circuits is with a
> simulator, and there are a number of free ones around.
> (Also a number of better ones that typically cost 
> quite a bit.) Besides being essential for real
> hardware design, circuit simulators are excellent
> educational tools as well as being absolutely terrific
> time wasters (fair warning). Perhaps the easiest to
> use is the student version of PSPICE.
> Attached are pdf files of the original circuit as
> entered into PSPICE, and the resulting output. I hope
> this does not run afoul any list rules against posting
> attachments. If it does, please accept my apologies. I
> am new to this.
> Regards,
> Ed McHale