Alt-BEAM Archive
Message #10391
To: beam@sgiblab.sgi.com
From: owner-beam@sgiblab.sgi.com [mailto:owner-beam@sgiblab.sgi.com]On
Date: Fri, 18 Feb 2000 08:36:09 -0500
Subject: [alt-beam] Re: pdiode ptransistor?
Could you explain that a little please?
Rob
Sathe Dilip wrote:
> That' right. Also having the two diodes back to back ensures that
> (irrespective of the polarity of the associated circuitry) atl east one
> of them is reverse biased thus offering a high equivalent impedance to
> rest of the circuitry so that its function is not affected (in an
> unwanted way).
> Rob wrote:
> >
> > Sathe Dilip wrote:
> >
> > > A photo diode will just give you the increase in leakage current when
> > > exposed to light.
> >
> > So is that how the two photodiodes work in a bicore? They are connected
> > cathode to cathode and when the light hits one side it leaks allowing
the
> > current to flow opposite to its orientation but with the orientation of
the
> > other photodiode. (clear enough I hope)
> >
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Attachment: LDR bridge.doc
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