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noise source question
Hello,
I'm willing to make a noise source from an UHF transistor (B-E junction reverse polarized like a zener) and I was wondering if it's ok to use the output attenuator as part of the resistor network for the DC bias of the transistor (or zener). I'd probably look at the arrl handbook if I had it ;-) Thanks Francesco IZ8DWF |
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noise source question
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noise source question
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#4
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noise source question
On 13 Mag, 02:17, RFI-EMI-GUY wrote:
wrote: Hello, I'm willing to make a noise source from an UHF transistor (B-E junction reverse polarized like a zener) and I was wondering if it's ok to use the output attenuator as part of the resistor network for the DC bias of the transistor (or zener). I'd probably look at the arrl handbook if I had it ;-) Thanks Francesco IZ8DWF I would think that your biasing of the resistor network would create some amount of noise which of course would not be attenuated to the same extent as the semiconductor. But then again it may be negligeable. well, indeed it would raise the termal noise of the resistor network, but we are talking about less than 1 mA currents and the noise from the source will be by far superior. I was more concerned about adding some DC to the output, I might just try building it, but I was trying to be sure about possible implications before beeing happy with a result :-) Thanks Francesco IZ8DWF |
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noise source question
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