Good AM Demodulator - Electronic Circuits Projects Diagrams Free

xxhyhxx · 28th December 2005, 12:18 AM

Hi friends,

Kindly help me in making this project. I need any possible requirements (circuits and thoeries) in making a good am demodulator.

Thank you in advance.
Belated Merry Cristmas and advance Happy New Year!!!

XXHYHXX

Roff · 28th December 2005, 04:50 AM

Have you done a simple Google searchfor "am demodulator"? There is a lot of information available, this for example. Note that there are several types of demodulators discussed on successive pages.
Also, search for "synchronous AM demodulator ".

pramodram2k6 · 1st January 2007, 09:28 AM

you r searching simple type of am demodulator,
u get lot

mvs sarma · 1st January 2007, 11:59 AM

Hi xxhyhxx,

A good demod -- active type can be realised by NE612, MC1496(this uses lot of components) and you may use ring modulator as demod.

Try any of them

All the best.

Hero999 · 1st January 2007, 12:50 PM

What frequency are you using?

SSB, DSB?

Analog · 1st January 2007, 01:42 PM

how about a simple diode detector?

**Nigel Goodwin** · 1st January 2007, 01:48 PM

How about a piece of galena crystal and a fine metal wire?.

Roff · 1st January 2007, 04:50 PM

Quote:

Originally Posted by Nigel Goodwin

How about a piece of galena crystal and a fine metal wire?.

LOL! That's how I got started in electronics, circa 1955. It is an AM demodulator (if you find a sensitive spot), but good???

mvs sarma · 1st January 2007, 04:59 PM

Conventional envolope detection by germanium diode like europian OA79,etc or japanese 1N34A and a post detection filter is OK but as our member has to do a project, he may perhaps aim something else. Ofcourse, he could also go for a transistor active detector.

mvs sarma · 1st January 2007, 05:09 PM

Hi,

the site mentioned by Ron H is really good. after almost a gap of 40 yeras i recollect fondly, FOSTER-SEELEY discriminator.. Thanks you Ron H sir

Also, we recollect the razor blade and wire pieces acting as detectors (perhaps same as quoted by Nigel --may be those used to have some coating)

**Nigel Goodwin** · 1st January 2007, 06:40 PM

Quote:

Originally Posted by Ron H

LOL! That's how I got started in electronics, circa 1955. It is an AM demodulator (if you find a sensitive spot), but good???

I got started in 1955 as well! - but not in Electonics!

Top Cap · 1st January 2007, 07:20 PM

Quote:

Originally Posted by Nigel Goodwin

I got started in 1955 as well! - but not in Electonics!

Sorry Nigel I have to ask, was that birth or puberty

To keep with the thread, keep it simple if a basic detector is needed and that comes back to the good old germanium diode. Works better than a coherer

Les

**Nigel Goodwin** · 1st January 2007, 07:32 PM

Quote:

Originally Posted by Top Cap

Sorry Nigel I have to ask, was that birth or puberty

Watford isn't that far away you know!

Quote:

To keep with the thread, keep it simple if a basic detector is needed and that comes back to the good old germanium diode. Works better than a coherer

Les

Now that's getting TOO old, at least a galena crystal and cats whisker is a semiconductor device - essentially the same as a germanium diode?.

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28th December 2005, 12:18 AM	#1
xxhyhxx	Good AM Demodulator Hi friends, Kindly help me in making this project. I need any possible requirements (circuits and thoeries) in making a good am demodulator. Thank you in advance. Belated Merry Cristmas and advance Happy New Year!!! XXHYHXX __________________ overwhelming ideas are not enough, but more heads are better than one!!!

28th December 2005, 04:50 AM	#2
Roff	Have you done a simple Google searchfor "am demodulator"? There is a lot of information available, this for example. Note that there are several types of demodulators discussed on successive pages. Also, search for "synchronous AM demodulator ". __________________ Ron

1st January 2007, 09:28 AM	#3
pramodram2k6	am demodulator you r searching simple type of am demodulator, u get lot

1st January 2007, 11:59 AM	#4
mvs sarma	Hi xxhyhxx, A good demod -- active type can be realised by NE612, MC1496(this uses lot of components) and you may use ring modulator as demod. Try any of them All the best. __________________ Regards, Sarma.

1st January 2007, 12:50 PM	#5
Hero999	What frequency are you using? SSB, DSB? __________________ I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong. Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.

1st January 2007, 01:42 PM	#6
Analog	how about a simple diode detector? __________________ "Everything that is done in the world is done by hope." -Martin Luther "There are two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle."-Albert Einstein

1st January 2007, 01:48 PM	#7
Nigel Goodwin	How about a piece of galena crystal and a fine metal wire?. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

1st January 2007, 04:59 PM	#9
mvs sarma	Conventional envolope detection by germanium diode like europian OA79,etc or japanese 1N34A and a post detection filter is OK but as our member has to do a project, he may perhaps aim something else. Ofcourse, he could also go for a transistor active detector. __________________ Regards, Sarma. Last edited by mvs sarma; 1st January 2007 at 05:17 PM.

1st January 2007, 05:09 PM	#10
mvs sarma	Hi, the site mentioned by Ron H is really good. after almost a gap of 40 yeras i recollect fondly, FOSTER-SEELEY discriminator.. Thanks you Ron H sir Also, we recollect the razor blade and wire pieces acting as detectors (perhaps same as quoted by Nigel --may be those used to have some coating) __________________ Regards, Sarma. Last edited by mvs sarma; 1st January 2007 at 05:18 PM.