Gain-boosted N-path bandpass filter
Pui-In Mak; Zhicheng Lin; Rui Paulo da Silva Martins
Rights HolderUniversity of Macau
Date Available2016-06-21
CountryUnited States
Contribution Rank1

The present invention discloses a gain-boosted N-path SC bandpass filter (GB-BPF) with a number of sought features. It is based on a transconductance amplifier (Gm) with an N-path SC branch as its feedback network, offering 1) double RF filtering at the input and output of the Gin one step; 2) customized passband gain and bandwidth with input-impedance match, and 3) reduced physical capacitance thanks to the loop gain offered by Gm. All have been examined using a RLC model of the SC branch before applying the linear periodically time-variant (LPTV) analysis to derive the R, L and C expressions and analytically study the harmonic selectivity, harmonic folding and noise. The latter reveals that: 1) the noise due to the switches is notched at the output, allowing smaller switches to save the LO power; and 2) the noises due to the source resistance and Gare narrowband at the output, reducing the folded noise during harmonic mixing

Application Date2015-06-01
Patent NumberUS9374063B1
Application NumberUS14726881
Open (Notice) NumberUS9374063B1
Fulltext Access
Document TypePatent
Faculty of Science and Technology
AffiliationUniversity of Macau
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Pui-In Mak,Zhicheng Lin,Rui Paulo da Silva Martins. Gain-boosted N-path bandpass filter. US9374063B1[P]. 2016-06-21.
APA Pui-In Mak,Zhicheng Lin,&Rui Paulo da Silva Martins.(2015-06-01).Gain-boosted N-path bandpass filter.
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