[R-390] Precision AM Detector Circuit

[Perry Sandeen]

     Hi gang,

     I buy an English magazine called Electronics World.  It always has a feature of reader
circuits, which usually aren’t applicable to anything I need.

However, in the Jan ’03 issue they had a circuit called "Precision full wave rectifier".  This
didn’t peak my interest until I read the last part the said it "will rectify up to about 2Mhz,
with input signals as low as 10 micro-volts.  I originally used it for full envelope detection in
a 455Khz IF chain." 

It uses 7 GASP, WAIL, KNASHING OF TEETH, very cheap resistors and can be built on Rat Shack perf
board with no sweat.

In the same magazine in May ’04 an revamped circuit was done with spice simulation.

While it may be tough to put into a R390, There is plenty of space in a SP600.

The first article is a one page file that is 2.4 Mbyte TIFF image or a 4.8Mbyte RTF doc.

The second article is 6 pages long.  Each file is about 3.5 Mbytes as a TIFF file.

I will be glad to email one or both to any (PMS Martyrn excepted) who reply off list.  Regards,
Perrier  



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