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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Soer, M. Klumperink, E. Ru, Z. van Vliet, F.E. Nauta, B. |
| Copyright Year | 2009 |
| Description | Author affiliation: University of Twente, Enschede, Netherlands (Soer, M.; Klumperink, E.; Ru, Z.; van Vliet, F.E.; Nauta, B.) |
| Abstract | Spurious-free dynamic range (SFDR) is a key specification of radio receivers and spectrum analyzers, characterizing the maximum distance between signal and noise+distortion. SFDR is limited by the linearity (intercept point IIP3 mostly, sometimes IIP2) and the noise floor. As receivers already have low noise figure (NF) there is more room for improving the SFDR by increasing the linearity. As there is a strong relation between distortion and voltage swing, it is challenging to maintain or even improve linearity intercept points in future CMOS processes with lower supply voltages. Circuits can be linearized with feedback but loop gain at RF is limited [1]. Moreover, after LNA gain, mixer linearity becomes even tougher. If the amplification is postponed to IF, much more loop gain is available to linearize the amplifier. This paper proposes such an LNA-less mixer-first receiver. By careful analysis and optimization of a passive mixer core [2,3] for low conversion loss and low noise folding it is shown that it is possible to realize IIP3≫11dBm and NF≪6.5dB, i.e. a remarkably high SFDR≫79dB in 1MHz bandwidth over a decade of RF frequencies. |
| File Size | 1256181 |
| File Format | |
| ISBN | 9781424434589 |
| DOI | 10.1109/ISSCC.2009.4977388 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-02-08 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Noise measurement Linearity Receivers Voltage Radio frequency Dynamic range Spectral analysis Noise figure CMOS process Feedback circuits |
| Content Type | Text |
| Resource Type | Article |
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