[sdiy] Interesting PNP's

[René Schmitz]

Hi Ian!

>Nosing through my Digikey catalog I noticed that Zetex has some interesting 
>high-gain, medium-power PNP devices.  To check these out, I ordered 10 ea 
>ZTX795A.  Here are some of my characterization results.  I will compare 
>these with the MAT03 pairs from AD.

An interesting device!

>Does anyone have a simple way to measure log conformance, without fancy lab 
>equipment?

There is a circuit in the AD Datasheet for the MAT02. (Figure 18)
In essence a bridge of two log converters who are fed with sawtooth voltages 
with a fixed ratio of amplitudes. The only fancy thing here is an 
instrumentation amp. But they are easily obtainable.

Cheers,
 René





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uzs159 at uni-bonn.de
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