Can you parallel transistors to get the differing emitter areas?

Sherpa Doug

> -----Original Message-----
> From: Russell McMahon [mailto:apptech@CLEAR.NET.NZ]
> Sent: Tuesday, February 12, 2002 4:16 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: Brokaw cells.
>
>
> > I'm looking for a schematics of a brokaw cell that doesn't
> depend on using
> 2
> > transistors  with different emiter areas. Does sucha a
> thing exist ? Any
> links ?
>
>
> (A Brokaw cell is one type of band-gap reference circuit).
>
> An excellent practical introduction to band-gap references is
> given by Nat
> Semi at
>
>         http://www.national.com/rap/Application/0,1570,24,00.html
>
> This includes (and tends to concentrate on) the Brokaw cell but also a
> number of other band-gap implementations. If you are more
> interested in the
> result than the specific method then you may find something
> useful here. I
> do like the utter simplicity of the "brute force" diode
> string approach
> although you do need more than 5 volts to implement it.
>
>
>
>         RM
>
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