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Abstract
broadband inductorless low-noise amplifier (LNA)
design that utilizes simultaneous noise and distortion cancellation
is presented. Concurrent cancellation of the intrinsic third-order
distortion from individual stages is exhibited with the commongate
and common-source cascade. The LNA IIP.. is then limited
by the second-order interaction between the common source and
common gate stages, which is common in all cascade amplifiers.
Further removal of this third-order distortion is achieved by incorporating
a second-order-distortion-free circuit technique in the
common gate stage. Implemented in 0.13 m CMOS technology,
this LNA achieved..16 dBm IIP.. in both the 900 MHz and 2 GHz
bands. Measurements demonstrate that the LNA has a minimum
internal gain of 14.5 dB, noise figure of 2.6 dB from 800 MHz to
2.1 GHz while drawing 11.6 mA from 1.5 V supply voltage.
Index Terms桞roadband LNA, distortion cancellation, noise
cancellation, volterra series analysis. |
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