28 Apr
2009
28 Apr
'09
10:41 a.m.
At 12:00 -0500 4/28/09, Jonas wrote:
Two diodes connected back to back will never be
anything but two diodes
connected back to back. No current gain *at all*.
Is 1.0 (as in, output current = base current times 1.0) a "gain"? I
suppose it's a legitimate value of hfe (I grant, it's not a useful
value).
--
- Mark 210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
technology adequate to stop them:
Think of it as Evolution in Fast-Forward.
28 Apr
28 Apr
11:54 a.m.
On Tue, 28 Apr 2009, Mark Tapley wrote:
Date: Tue, 28 Apr 2009 12:41:49 -0500
From: Mark Tapley <mtapley at swri.edu>
Reply-To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
To: cctalk at classiccmp.org
Subject: Re: Transistors...
At 12:00 -0500 4/28/09, Jonas wrote:
A current gain of one could be useful if you had power gain, something you
will not have with two diodes....
Peter Wallace
Two diodes connected back to back will never be
anything but two diodes
connected back to back. No current gain *at all*.
Is 1.0 (as in, output current = base current times 1.0) a "gain"? I suppose
it's a legitimate value of hfe (I grant, it's not a useful value).
--
- Mark 210-379-4635
----------------------------------------------------------------------- 
1:34 p.m.
A friggin piece of wire has a gain of 1 !!!!
/ steven
On Tue, 28 Apr 2009, Mark Tapley wrote:
> Date: Tue, 28 Apr 2009 12:41:49 -0500
> From: Mark Tapley <mtapley at swri.edu>
> Reply-To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> To: cctalk at classiccmp.org
> Subject: Re: Transistors...
>
> At 12:00 -0500 4/28/09, Jonas wrote:
>> Two diodes connected back to back will never be anything but two diodes
>> connected back to back. No current gain *at all*.
>
> Is 1.0 (as in, output current = base current times 1.0) a "gain"? I
suppose
it's a
legitimate value of hfe (I grant, it's not a useful value).
--
- Mark 210-379-4635
-----------------------------------------------------------------------
A current gain of one could be useful if you had power gain, something you
will not have with two diodes....
Peter Wallace
1:45 p.m.
On Tue, 28 Apr 2009, Scanning wrote:
Date: Tue, 28 Apr 2009 13:34:36 -0700
From: Scanning <steven.alan.canning at verizon.net>
Reply-To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Subject: Re: Transistors...
A friggin piece of wire has a gain of 1 !!!!
/ steven
True, but this is about current gain , for example a transistor with a current
gain of 1 might switch 50V at one amp with an input of .7V at 1 A giving a
power gain of ~70.
Peter Wallace
5721
days inactive
5722
days old
8 comments
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