Design of a Noise-Canceling CMOS Wideband Receiver Front-End with Inherent Active Balun

Autor: Michael Yan Wah Chia, Bo Shi
Rok vydání: 2011
Předmět:
Zdroj: Circuits, Systems, and Signal Processing. 30:741-753
ISSN: 1531-5878
0278-081X
DOI: 10.1007/s00034-011-9303-z
Popis: This paper presents the design of an ESD-protected noise-canceling CMOS wideband receiver front-end for cognitive and ultra-wideband (UWB) radio-based wireless communications. Designed in a 0.13-μm CMOS technology, the RF front-end integrates a broadband low-noise amplifier (LNA) and a quadrature down-conversion mixer. While having ESD and package parasitics absorbed into a wideband input matching network, the LNA exploits a combination of a common-gate (CG) stage and a common-source (CS) stage to cancel the noise of the CG-stage and to provide a well balanced differential output for driving the double-balance mixer, which has a merged quadrature topology. A variable-gain method is developed for the LNA to achieve a large factor of gain switch without degrading the input impedance match and the balun function. Drawing 24 mA from 1.5 V, simulations show that the proposed front-end has a 3-dB bandwidth of around 10 GHz spanning from 1.8 GHz up to 11.8 GHz with a maximum voltage conversion gain of 30 dB and a noise figure of 4.3–6.7 dB over the entire band.
Databáze: OpenAIRE
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