2004
DOI: 10.1109/jssc.2003.820865
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A Fully Integrated 0.18->tex<$mu$>/tex<m CMOS Direct Conversion Receiver Front-End With On-Chip LO for UMTS

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Cited by 56 publications
(18 citation statements)
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“…In certain applications where the filtering is critical but the blocker level is not as strong as those in GSM, the down-conversion mixer power consumption could be lowered significantly. A good example is 3G applications [13], as mentioned earlier, where due to the TX leakage in the receiver band, typically an external SAW filter at the input is required. Although to relax the receiver front-end linearity a notch filer at the TX frequency (190 MHz away for band I, for example) is needed, the blocker strength is fairly weak, around −20 to −30 dBm for most typical duplexers.…”
Section: Conclusion and Discussionmentioning
confidence: 99%
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“…In certain applications where the filtering is critical but the blocker level is not as strong as those in GSM, the down-conversion mixer power consumption could be lowered significantly. A good example is 3G applications [13], as mentioned earlier, where due to the TX leakage in the receiver band, typically an external SAW filter at the input is required. Although to relax the receiver front-end linearity a notch filer at the TX frequency (190 MHz away for band I, for example) is needed, the blocker strength is fairly weak, around −20 to −30 dBm for most typical duplexers.…”
Section: Conclusion and Discussionmentioning
confidence: 99%
“…6 Example of receiver problems due to blockers with the SAW filter removed. isolation in the TX band, it can shown that with typical blocker levels specified in the 3GPP standard, this could lead to an IIP3 requirement of somewhere around −5 to 5 dBm [13].…”
Section: Introductionmentioning
confidence: 99%
“…For example, GSM 900 MHz receivers require operating frequencies between 0.925 to 0.960 GHz [1]. QOs are important for receivers and examples of reasons are as follows: a) Hartley and Weaver image-reject receivers [2], superheterodyne receivers [3], zero-intermediate frequency (zero-IF) or direct-conversion receivers [4], low-IF [5], digital IF [3] receivers and direct digital or digital RF receivers [3] employ the quadrature downconverter. b) Double low-IF and wide-band IF receivers [3] employ the double quadrature downconverter.…”
Section: Introductionmentioning
confidence: 99%
“…As an example, a + 24 dBm transmitted signal, corresponding to a class III UMTS handset determines a leakage into the receiver input of − 30 dBm, taking into account the isolation provided by a typical commercial duplexer. Meeting the sensitivity requirement of the standard involves a trade off between noise figure, second-order intermodulation distortion and phase noise [1]. The minimum IIP2 at the antenna connector must be grater than + 46 dBm.…”
Section: Introductionmentioning
confidence: 99%