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About cleggsan
Expertise
All technical areas of Electronics Engineering.

Experience
BSEE, MBA, Design, R&D, University Research.
Senior Life Member of IEEE. Life Fellow of AES.

Organizations
IEEE, Consumer Electronics Society, Audio Engineering Society.
Broad teaching experience; work experience mostly in consumer electronics and conversion from analog to digital technologies. Pioneer in digital audio at all levels.
 
   

You are here:  Experts > Computing/Technology > Job Searching: Technical > Electrical Engineering > modulators

Electrical Engineering - modulators


Expert: cleggsan - 2/4/2004

Question
In a balanced ring modulator,how is the carrier suppression accomplished and is a Phase modulator a common type of a balanced modulator?

Answer
There are so many kinds of  modulation now days it is almost impossible to keep up with them unless you specialize in communication systems.

With the digital era and advanced digital filtering, availability of IC chips with all kinds of features, it provides for many modulation applications. In particular, the cellular and mobile communications systems are using modulation of many kinds and they have advanced the science greatly.  Music and waveform synthesizers use ring modulators all over the place.

In a balanced ring modulator, the carrier is nulled out by either a mixing of the carrier with itself, but out of phase or in a ring circuit which cancels the carrier as it oscillates.

Phase modulation is common, yes.  Balanced phase modulators are common in optoelectronic systems in the gigahertz area of communications.

The application for modulation theory is very broad from audio and music to broadcasting to telecommunications and digital information.  So, if you would narrow down your field I can be more specific in a reply to your question.

All school textbooks on communications or radio and broadcasting cover these subjects well.

There are many advanced ideas, products and examples on the net - just to a google.com search and you will be flooded with lots of interesting information; maybe too much information!

Don't want to overload you with information, so just let me know what else you may need to know.

All the best,
Cleggsan  

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