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Design >> RF Design >> linearity and DC_lo
https://designers-guide.org/forum/YaBB.pl?num=1261726920

Message started by microwaver118 on Dec 24^th, 2009, 11:41pm

Title: linearity and DC_lo
Post by microwaver118 on Dec 24^th, 2009, 11:41pm

Hi guys:
When I design a current driven passive mixer, a problem came to me. because passive switch, the DC bias of lo has a strong relationship with linarity,an optimum point can get at one state but it changes to another with Temp& Process varys.
HOW TO SET THE DC_lo WHEN WANT GOOD LINEARITY?
any suggestion would be welcome! thankyou!

Title: Re: linearity and DC_lo
Post by nxing on Feb 17^th, 2010, 3:38pm

why do you think that the DC bias will affect the linearity of a passive mixer? the switches will go through a full swing. So, it should not matter for where do you bias it