Wide Band CMOS Low-Noise Amplifier Exploiting Noise Cancellation


Bruccoleri, Federico and Klumperink, Eric A.M. and Nauta, Bram (2002) Wide Band CMOS Low-Noise Amplifier Exploiting Noise Cancellation. In: ProRISC 2002, 13th Workshop on Circuits, Systems and Signal Processing, 28-29 November 2002, Veldhoven, the Netherlands (pp. pp. 224-231).

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Abstract:Well-known elementary wide band amplifiers
suffer from a fundamental trade-off between noise factor
and source impedance matching, which limits their noise
figure (NF) to values typically above 3dB. Negative
feedback can be employed to break this trade-off, thus
allowing lower noise figures, however, at the price of
potential instability. In contrast, this paper describes a
novel feed-forward noise cancelling technique, which
allows for design wide band Low Noise Ampliers (LNAs)
with sub 3dB noise figure, without suffering from
instability issues. This technique is also robust and easy to
use. Measurements on a wide band LNA realised in
0.25μm standard CMOS show NF values below 2.4dB over
more than one decade of bandwidth and below 2dB over
more than two octaves.
Item Type:Conference or Workshop Item
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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