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Single balanced mixer ssb generation?

时间:04-04 整理:3721RD 点击:
Hi can you please tell me if this circuit will work as a very simple SSB generator?
http://zpostbox.ru/single_balanced_mixer_circuit.html
What are the pros and cons?

I consider a very simple poor performance ssb generator.

It balances out the carrier so it produces DSB. You could use it as part of a phasing type SSB generator.
Frank

That is what I thought too. The output filter is not addequate for sideband filtering, despite what the article says.

Have you gone through the calculations to determine that the filter is not adequate?

No I have not done any calculations.
From my experience I think a single LC is not adequate in filtering out the opposite sideband.

Is it anything that you see in the circuit that I miss, that supposes that the filter should be adequate in attenuating the opposite sideband? (even not many dB, but just to be enough for ssb comunication)

It might work (but not very well) if the tuned circuit were tuned to 30 Khz and was of very high Q.

But 30 Mhz is laughable.

Just put the circuit in a freeware simulator and you will be surprised to find that doesn't work at all as a DSB modulator.
A cheap two-diode DSB modulator would work many times better:

http://ee.sharif.edu/~comcir/reading...es/Image94.gif

But I am talking about ssb here not dsb. I suspected that the circuit was not going to work...

Your suspicions are well founded.

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