[ICs..]

Thanks Audioguru..

I have found the actual HBTs in use in the VCOs.Si-Ge and InGa HBTs are there..

Those who wish to see can have a look at the following links..They will be helpful.Rather too many companies from Japan and Canada are into the business !

www.semicon.toshiba.co.jp/ eng/prd/pdf_presen/hfreq_VCO_200502_e.pdf -
www.eepn.com/Locator/Products/ ArticleID/30886/30886.html

Good Luck !

[ICs..]

Does anybody have any idea what these ICs are?....SY89424V, SY89429V, SY89420V, SY87701L..They are the oscillators but do they incorporate MODFET or other high speed devices?

Shiks

[simulation softwares]

What do the virtual diodes and other virtual components in MULTISIM mean? Does it imply that they are non-ideal and hence practical?

[Jammers]

  Thanks Ante & tnk2k
 
This means, a mobile jammer exists.It is portable and can be used as a handset like any other mobile handset.

Is there any area which needs to be improved? Any innovation.....?

[MODFET and HBT]

can one arbitrarily replace a BJT by an HBT or there are certain criteria like frquency etc?

[MODFET and HBT]

Both MODFET and HBTs are high speed devices..But as far as I know, MODFETs are still faster than HBTs..Then why would anybody like to prefer HBTs over MODFETs? I mean what are the advantages of HBTs?

[simulation softwares]

hi
What are the various softwares available for simulation?
Can MULTISIM simulate any kind of electronic circuit?

[Jammers]

So is it sure that no personal phone jammers exist as of now?
Anybody........?

[Jammers]

Thanks Ed..
Jammers must be using too much power then, to operate !
Well do the different types of antenna also have their individual properties? Which one is the best and mostly used?

.............

[Jammers]

hi all,

Could anybody please elaborate how a jammer actually works? Does it have a particular bandwidth of operaton or it jams all the frequencies in a particular region?

Also, if an antenna is a transmitting device what happens to a signal which is at the limit of the antenna capacity distance? It gets jammed or is unpredictable?

shiks.....

[high speed devices]

hi
Can anybody please tell me if the HBTs (Heterojuncton Bipolar Transistors) or any other high speed device can be used in the VCO to enhance its functioning.

Thanks