2015
DOI: 10.1002/cta.2125
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Tunable selective receiver front end with impedance transformation filtering

Abstract: A highly selective impedance transformation filtering technique suitable for tunable selective RF receivers is proposed in this paper. To achieve blocker rejection comparable to SAW filters, we use a two stage architecture based on a low noise trans-conductance amplifier (LNTA). The filter rejection is captured by a linear periodically varying (LPV) model that includes band limitation by the LNTA output impedance and the related parasitic capacitances of the impedance transformation circuit. This model is also… Show more

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Cited by 7 publications
(4 citation statements)
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“…N‐path filters, with their high tunability and linearity, are an interesting alternative for SAW filters in RF applications such as multi‐standard receivers . These filters are simply composed of switches and capacitors, and hence, can be easily realized on‐chip in CMOS technologies.…”
Section: Introductionmentioning
confidence: 99%
“…N‐path filters, with their high tunability and linearity, are an interesting alternative for SAW filters in RF applications such as multi‐standard receivers . These filters are simply composed of switches and capacitors, and hence, can be easily realized on‐chip in CMOS technologies.…”
Section: Introductionmentioning
confidence: 99%
“…The existing reconfigurable receivers in the literature are reported as wideband sampling receivers [5][6][7][8] and multistandard subsampling receivers. [9][10][11][12][13][14] In these sampling receivers, selection of the sampling frequency defines the receiver architecture, which includes an oversampling receiver with discrete-time mixer (DTM), 5 time-interleaved (TI) discrete-time oversampling receiver, 6 and sub-sampling receiver.…”
Section: Introductionmentioning
confidence: 99%
“…Recently, CMOS technology enhancement makes it possible to implement high-frequency N-path band-pass filters, even in radio frequencies (RF). Today, extensive research in this area is ongoing [18][19][20][21][22][23][24][25][26][27][28].Center frequency tunability in a wide frequency range by the switching frequency, capability of owning high Q-factor, linearity, and process scalability are some of the most attractive properties of the N-path filters [18,19]. Limited out-of-band rejection, due to the switches on-resistance (R SW ), and pass-band 'round' shape problems have been addressed in [20,21].…”
mentioning
confidence: 99%
“…Recently, CMOS technology enhancement makes it possible to implement high-frequency N-path band-pass filters, even in radio frequencies (RF). Today, extensive research in this area is ongoing [18][19][20][21][22][23][24][25][26][27][28].…”
mentioning
confidence: 99%