The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Design >> RF Design >> Layout issues
https://designers-guide.org/forum/YaBB.pl?num=1331506826
Message started by andr.dimitris on Mar 11th, 2012, 4:00pm

Title: Layout issues
Post by andr.dimitris on Mar 11th, 2012, 4:00pm
Does anyone know a good book or series of courses for rf circuit layout  (not just the design of the circuit but the actual physical design)? I have to design and do the layout of an LC and a Ring VCO (both at 5Ghz), but I have stuck with the layout. The output does not oscillate; it just has a steady value (the dc analysis however is consistent with the schematic). I attach some screens of the layout of the VCO. I use thick and big in width metals (top level) for the signal. For ground and supply lines, I use first level of metal and maximum width. I use a lot of connectors at the nodes; will this result into a problem? Should i use less connectors? I do not have a lot of experience with physical design as an undergraduate student. Does anyone have any suggestions that might help?

Title: Re: Layout issues
Post by andr.dimitris on Mar 11th, 2012, 4:03pm
i do not know if i am able to post multiple pictures at one post...sry.

Title: Re: Layout issues
Post by andr.dimitris on Mar 11th, 2012, 4:05pm
the whole vco...

Title: Re: Layout issues
Post by andr.dimitris on Mar 11th, 2012, 4:05pm
and the last one with the transistor I use for the current source

Title: Re: Layout issues
Post by loose-electron on Mar 11th, 2012, 6:56pm

andr.dimitris wrote on Mar 11th, 2012, 4:00pm:
Does anyone know a good book or series of courses for rf circuit layout  (not just the design of the circuit but the actual physical design)? I have to design and do the layout of an LC and a Ring VCO (both at 5Ghz), but I have stuck with the layout. The output does not oscillate; it just has a steady value (the dc analysis however is consistent with the schematic). I attach some screens of the layout of the VCO. I use thick and big in width metals (top level) for the signal. For ground and supply lines, I use first level of metal and maximum width. I use a lot of connectors at the nodes; will this result into a problem? Should i use less connectors? I do not have a lot of experience with physical design as an undergraduate student. Does anyone have any suggestions that might help?



Oscillators that do not oscillate in a simulator

you need a copy of Ken's book:

http://www.amazon.com/Designers-Guide-SPICE-Spectre%C2%AE-Series/dp/0792395719/ref=sr_1_sc_1?ie=UTF8&qid=1331516866&sr=8-1-spell

And on the practical aspect of layout you need Chris and Judy's book:

http://www.amazon.com/IC-Mask-Design-Essential-Techniques/dp/0071389962/ref=sr_1_fkmr0_1?s=books&ie=UTF8&qid=1331516926&sr=1-1-fkmr0

The Designer's Guide Community Forum » Powered by YaBB 2.2.2!
YaBB © 2000-2008. All Rights Reserved.