Electronics Forum / Design / November 2006

Hello Boy$ and Girlz
I am trying to use PSpice, just trying because I am new in designing
analog circuits. Now I want to implement the VCO cuircuit like it is
shown at http://www.adicss.de/ -----> Helix.

Can anyone tell me what's inside of these unbiqutitous LNB things that
I see on all the direct TV/DSS dishes?  Is there a nice GaaS FET in
there?
I have several of these things from my  ill fated TV viewing experience

I did a noise analysis with SPICE3 the other day and got confusing
results. Actually I wanted to twiddle around with the JFET pair we've
been discussing and let SPICE do the math for me. SPICE and I have
never been a good team because of mutual misunderstanding, of which

It's the first time I write on this NG. I have a question for you :)
What is the simplest (and cheapest) method to select one between two TTL
signals?
With logic gates I need two ANDs, one NOT and one OR (ok, I can use only

Seems we are in a great time for electronics hobbyists wrt to
instruments.
What PC instruments do you use and are you happy with them? I refer
specifically to lower cost USB type things, and not old-school big

It is so unfortunate that God's best creation - man - made in His very
own likeness, do not ehibit His very nature. Every moment of his life,
he keeps deviating from the truth - God's Truth.
There are so many lies in this world having themselves covered-up in

Ok, this is a classic audio doofer
http://johnhardyco.com/pdf/990.pdf
I was just wondering about the emiiter L's on the LM394s
1) they would seem to reduce the gain at MHzee bandwidthiums

I found an obscure reference which reads as follows. There is no
further information given.
"One person with whom I discussed this said you can use a lower
frequency carrier than the modulation. You can view the resulting

Have you ever made a wine glass or crystal sing by wetting your finger?
Would you believe that when you hit the resonant frequency of a tuning
fork, wine glass, or even a plain old drinking glass that is made of
glass, a very small signal, not even audiable, at the resonant

OK, I've got a 64-bit unsigned binary number, in a pair of 32-bit
registers, in an MC68332 cpu. Its maximum value is 1e13, which is 10
seconds measured in picoseconds, so the MS longword can only get up to
about 2328 or something like that. I'm looking for an efficient way to

I'm designing a medical device which generates shockwaves. I'm facing
serious EMI problems. The device generates the shockwaves by
discharging a high voltage capacitor through a Spark Gap, a triggering
transformer is used. The triggering transformer is triggered using a

I am studying the T.V systems for different regions for the DVD
Recorders I am working on. The regions are Asia Pacific, LATAM, NAFTA
and Europe.
I found a document explaining about the systems at

Hello, I'm looking to do a design involving data rates near 4Gbps and
was looking at using Altera's Stratix II GX transceivers to drive the
data to a 4Gbps single-mode fiber-optic transceiver. I'm interested in
how well the Stratix can perform this task, if anyone has some

I'm building a small board with a CPLD installed.  I'd like to plug
this board into a standard 40-pin DIP socket.  SIP pin strips have
0.025" pins which are too big to fit into a DIP socket.  Mill-Max makes
machined pin strips, but they're rather pricey.  Something like the

I stumbled across an odd idea.
If a home-built stacked-plate capacitor is operated with high-volt
pulses, the thin air film trapped between the foils and the dielectric
sheets should glow violet.  (I verified this idea using a quickie test