Hello All

I am thinking of some basic question about LO and I cant figure it out
I need your help to give me some explanation so I can further
investigate my text book.

Say there are 3 signals [frequency at wo-k, wo, wo+k]going into the
input of a LO. Then due to the nonlinearity of LO, we get
Intermodulation harmonics terms. If wo is the desired frequency while
the other two are interferers, my question is at which frequency Local
Oscillator will tune at?

For any theoritical and practical purposes, what is the method to find
the oscillator frequency and/or period?

Maybe this question sounds too general. Therefore, if you have any
further details to complement this question and doubts, kindly share
your views.
Thank you

rgds and thanks
Jason

Sometimes they are chosen in order
to have images fall outside the band.

Hi Richard and Mack

Thank you so much for the answers and advice.
I have cleared much of my doubts.
Do you know if Gilbert Cell is using Synchronous Detection or the one
with +/-IF?
Thank you and hear from you all

rgds and thanks
Jason

Hi Richard and Mack

Thank you so much for the answers and advice.
I have cleared much of my doubts.
Do you know if Gilbert Cell is using Synchronous Detection or the one
with +/-IF?
Thank you and hear from you all

rgds and thanks
Jason

On 11 Feb 2005 18:32:54 -0800, "Jason" wrote:
Thank you so much for the answers and advice.
I have cleared much of my doubts.
Do you know if Gilbert Cell is using Synchronous Detection or the one
with +/-IF?

Hi Jason,

The Gilbert Cell was one of the first linear ICs and useful for
balanced Mod/Demod. What comes with it is strictly your choice
(regarding the question of IF or Synchronous Detection).

It would be simpler if you simply said what you need.

73's
Richard Clark, KB7QHC

"Jason" wrote in message
ups.com...
Hi Richard and Mack

Thank you so much for the answers and advice.
I have cleared much of my doubts.
Do you know if Gilbert Cell is using Synchronous Detection or the one
with +/-IF?
Thank you and hear from you all

rgds and thanks
Jason

I don't know exactly what you want to do, but I have used the Motorola
MC1330 Synchronous Video detector as a CW-SSB/AM synchronous detector at a 9
MHz IF. The MC1330 uses Gilbert Cells. For AM you need an LC tuned circuit
at the IF frequency; For CW-SSB you feed a BFO signal (square wave works
fine) into the MC1330 at the same point. The DC level at the MC1330 output
depends on the signal amplitude; so, that can be used to derive an AGC
voltage. Tuning an AM signal is uncanny, in that a signal will sort of pop
in.

Tam/WB2TT

There is no zero or $ in comcast.