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<DIV>It can definitely be done. Its just that zeners seem to be a bit more finicky than reversed biased transistors about making a lot of noise. Also I have read that the zener effect is actually different from the avalanche effect. The reversed biased transistor gives an avalanche effect.</DIV>
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<DIV>Anyone want to chime in on the difference.</DIV>
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<DIV>Ray</DIV>
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<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR><BR>> I'm contemplating a circuit that uses a reverse-biased base-emitter junction <BR>> as a noise source. How would these compare with just using a zener diode of <BR>> a similar voltage range (around 7 or 8 volts)? <BR>> <BR>> Can the same sort of thing be done with a germanium device rather than <BR>> silicon? <BR>> <BR>> <BR>> <BR>> <BR>> <BR>> </BLOCKQUOTE></body></html>