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想增加iip3的可以看看这篇文章
Abstract—A low-power highly linear CMOS RF amplifier
circuit composed of a Multiple-Gated common-source FET
TRansistor (MGTR) in cascode configuration is reported. In a
MGTR amplifier, linearity is improved by using transconductance
linearization which can be achieved by canceling the negative
peak value of of the main transistor with the positive one
in the auxiliary transistor having a different size and gate drive
combined in parallel. This enhancement, however, is limited by
the distortion originated from the combined influence of
and harmonic feedback, which can greatly be reduced by the
cascoding MGTR output. IP3 improvement as large as 10 dB
has been obtained from an experimental RF amplifier designed
at 900 MHz and fabricated using 0.35 m BiCMOS technology
using only CMOS at a similar power consumption and gain as
those obtainable from conventional cascode single gate transistor
amplifiers.
Index Terms—CMOS, IP3, MGTR, nonlinearity. |
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eetop公众号
创芯大讲堂
创芯人才网
发表于 2007-3-14 22:36:42
