Add the working "VUE Meters" enclosed in the zip to your SDRadio or
Winrad, its really cool to use. I use it with CIAO also. I searched a
long while to find some that finally work. Just click it on when you
are using your SDR software. Do not resize, but if you do and can't
get it back to size; just "right click" it with the mouse and your back
to size again.
*The AD8333 by Analog Devices seems the thing for Soft Rock 40 like
projects which would reduce the numbers of parts and also remove the
need for a phase splitting transformer. Don't let the 32 pin structure
scare you. You will not use all of them pins. Some may however
require grounding as indicated. We do need someone to come up with a
place to get a 32 pin prototyping surfboard for using these chips.
{Using this does not mean I am departing away from DIP chips and other
designs. But this is interesting to use nonetheless. And who knows?}
The closest board Jameco has is a 28 pin surfboard. So they don't
have anything.
The AD8333 Data Sheet PDF might at first seem to indicate that the
device requires allot of external parts, however it does not have to be
used in the complex ways depicted. The binary logic to select the
proper phase shift in degrees should be via a preset High State voltage
on the proper pins: I assume this is the case by the logic state chart
depicted in the data. In time we'll know more about it all.
Note: the LO IN is a "divide by 4" input! It also seems that it has
somewhat of a high level output. 161 dB/Hz. The data indicates
however that the output needs to be either passband filtered or at
least matched up with the right external chips. The base band is
determined by the output circuits accoding to the data.
An interesting note is the page 10 section: "Bypassing Current Mirror
and Decreasing Noise."
You do not have to have a complexity as elaborate as the Evaluation
Board Diagrams in the AD8333 Data Sheet.
Basically, you only need to split the antenna or i.f. input (if you
are sampling a seperate reciever i.f.) into two in phase lines going to
inputs CH1 and CH2 of the AD8333. Add in the LO IN and let the chip
phase shift the signals as it is designed to do. Followed then by a
suitable audio amplifier IC's. Some PC soundcards might be able to use
the raw output after a little filtering which might merely be a RC sort
of filter.
Splitting of the antenna input can be done by a simple resistor
network but I have also seen a sort of low pass inductor input in each
split section but the idea is to simply divide and keep them in phase
here. And so, that won't require rocket science.
Since the circuit seems to have allot of gain I assume it can be used
merely via an antenna input without forward or frontend gain of any sort.
If you get some samples we all then can explore this chip and see
what all it will take? And how simple it can be? If we can also get
us some 32 pin surface mount protoboards somewhere? The AD8333
evaluation boards are way to high priced for us I feel.
LO IN's:
455 kHz*4 = 1820 kHz = 1.820 MHz
10.7 MHz*4 = 42.80 MHz
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