jecyhale
Joined: 19 Feb 2008
Posts: 442
Helped: 46
Location: China
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 21 Aug 2008 9:03 Re: for help: Bias condition of LO switch pair of Gilbert mi |
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| wireless man wrote: |
hi, Does anybody can tell me what bias conditon of the LO switchpair should be ? Some body tell me that the LO switch pair should be biased at Vgs ≈Vth, and smaller than Vth. Do you think it is right or not?
Thks. |
Vgs≈Vth or not is detemined by the MOS size and current. NOT the bisa condition.
In my opinion, you should quarantee the Vds >Vgs.
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