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Design >> RF Design >> region 0 in dc operation point
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Message started by James Bond on Jul 6^th, 2007, 7:59am

Title: region 0 in dc operation point
Post by James Bond on Jul 6^th, 2007, 7:59am

Hi,

does anybody know 'region 0' in dc operation point mean triode region or cut off region ? I am simulatiing passive mixer, I found the four transistors are all working in the region 0 state, and I still get IF output. But in my memory, region 0 represents cutoff state, and region 1 represents triode state, and one pair of switches of the mixer should work in the triode region, the other two should work in the cutoff state.

Best Regards
James

Title: Re: region 0 in dc operation point
Post by Ken Kundert on Jul 6^th, 2007, 3:03pm

To find out, type "spectre -hs bsim3v3" and look for the description of the region parameter. It will give a list of regions. The first listed will be region 0, the second will be region 1, etc.

-Ken

Title: Re: region 0 in dc operation point
Post by James Bond on Jul 6^th, 2007, 3:19pm

Ken Kundert wrote on Jul 6^th, 2007, 3:03pm:

To find out, type "spectre -hs bsim3v3" and look for the description of the region parameter. -Ken

Hi, Ken,

Thank you for the reply, could you kindly tell me where to input this command ? I tried in CDS.log window, but it returns ''unbond variable -hs''

Title: Re: region 0 in dc operation point
Post by boe on Jul 6^th, 2007, 3:33pm

Command line (UNIX)
BOE