On Thu, 14 Sep 2000 09:48:38 -0400 William Fuqua <Wlfuqu00@pop.uky.edu>
writes:
>
>Oh, no!!!! here is the DAF amp discussion again but solid state this
time!!!!
>I am very interested in how this turns out. If the experiment is
successful
>it would support the DAF theory.
>
>73
>Bill wa4lav
>
Hi Bill,
Noooo.... not definitely not DAF but, SSB amplification by Envelope
Elimination and Restoration (EER).
This is actually very old knowledge. I refer you to the original
article by Leonard R. Kahn on pp 803-806 of the July 1952 Proceedings of
the IRE.
For a more contemporary explanation, see an article by Frederick Raab
on pp. 70-73 of the May 1994 RF Design magazine.
Both of the above implementations are handicapped by trying to amplify
an already generated SSB signal. This requires a substantial delay in
the RF chain to equalize the slower signal path of the audio (modulation)
chain.
I have the advantage in my proposed scheme in that I can equalize the
paths in the DSP section before the SSB signal is created.
73,
Marv WC6W
*
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