Design Engineering Exercise of the Week

[Fred Bloggs]

Spehro Pefhany wrote:

On Sun, 04 Jan 2004 17:53:36 GMT, the renowned Fred Bloggs
nospam@nospam.com> wrote:

Yep- about 200uV/oC for each factor 10x current. But you might note that
the level shifting current is approximately the same as Q2 current, so
the Vbe's in the cancellation equation are negligibly the same.


Yes okay, it's outside the DC FB loop..

Best regards,
Spehro Pefhany

Yes- the circuit is very cleverly done in many respects-)

 

[Jim Thompson]

On Sun, 04 Jan 2004 10:34:53 -0700, Jim Thompson
<invalid@invalid.invalid> wrote:

[snip]

At *constant* current *all* transistors have the *same* TC
irrespective of current (unless in current crowding in low current
[snip]................................insert "or" --^

...Jim Thompson
--
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