[sdiy] Patchell's Boggling 13700 Expo Converter Thing???

[Ian Fritz]

At 06:27 PM 6/21/2003, Jim Patchell wrote:

>         The second block is the temperature sensor. The temp sensor is 
> made up of Q6A, Q6C, U10 and U11B.  The configuration is a Band Gap Reference.

This is something I'm still confused about.  I looked up everything I could 
find on bandgap references and they seem to be something different.  They 
use a PTAT generator like the Q6A and Q6C arrangement, but they use this 
with further circuitry to generate a stable reference voltage.  Can someone 
clarify the reason this is being called a band gap reference?

   Ian