Journal
IEEE JOURNAL OF SOLID-STATE CIRCUITS
Volume 43, Issue 5, Pages 1164-1176Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSSC.2008.920335
Keywords
broadband LNA; distortion cancellation; noise cancellation; volterra series analysis
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A 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 common-gate and common-source cascade. The LNA IIP3 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 mu m CMOS technology, this LNA achieved + 16 dBm IIP3 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.
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