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.
|Title of host publication||13th ProRISC Workshop on Circuits, Systems and Signal Processing|
|Place of Publication||Utrecht|
|Number of pages||8|
|Publication status||Published - Nov 2002|
|Event||13th Workshop on Circuits, Systems and Signal Processing, ProRISC 2002 - Veldhoven, Netherlands|
Duration: 28 Nov 2002 → 29 Nov 2002
Conference number: 13
|Publisher||STW Technology Foundation|
|Workshop||13th Workshop on Circuits, Systems and Signal Processing, ProRISC 2002|
|Period||28/11/02 → 29/11/02|
- wide band
- noise cancelling
- Low-noise amplifier
- noise cancellation
Bruccoleri, F., Klumperink, E. A. M., & Nauta, B. (2002). Wide Band CMOS Low-Noise Amplifier Exploiting Noise Cancellation. In 13th ProRISC Workshop on Circuits, Systems and Signal Processing (pp. 224-231). Utrecht: STW.