A Novel Low-Power Notch-Enhanced Active Filter for Ultrawideband Interferer Rejected LNA
In: IEEE Transactions on Microwave Theory and Techniques, Jg. 69 (2021-03-01), S. 1684-1697
Online
unknown
Zugriff:
In this article, a novel low-power notch-enhanced active filter is presented using the feedback notch-enhanced (FNE) technique. The active notch filter is proposed based on an area-saving second-order $LC$ series resonator. The passive devices’ loss can be effectively eliminated by the generated dc power-independent negative resistance by inserting a current feedback transistor. Moreover, the capacitive source degeneration (CSD) technique is proposed to boost the filter $Q$ by shifting the series resonant frequency to the negative-resistance region. To demonstrate the feasibility and practicability of the proposed notch filter, a 3.1–10.6-GHz IEEE 802.11a interferer rejected low-noise amplifier (IR-LNA) is fabricated in a 0.13- $\mu {\hbox {m}}$ CMOS process. The multistage structure, consisting of a common-gate (CG) stage with a dual-resonance load and a cascode stage with the proposed active notch filter, is employed for wideband input matching, gain flatness, and interferer rejection (IR) simultaneously. The measurements show that the IR-LNA provides a maximum of 16.05-dB power gain, 2.08–3.70-dB noise figure (NF) in the desired band, and a maximum of 40.9-dB IR ratio (IRR) at 5.77 GHz, with a power consumption of 10.2 mW, while the active notch filter only consumes 456- $\mu {\hbox {A}}$ current.
Titel: |
A Novel Low-Power Notch-Enhanced Active Filter for Ultrawideband Interferer Rejected LNA
|
---|---|
Autor/in / Beteiligte Person: | Tan, Tao ; Li, Yubing ; Chen, Deyang ; Qi, Zihang ; Cao, Cheng ; Li, Xiuping ; Huang, Zemeng |
Link: | |
Zeitschrift: | IEEE Transactions on Microwave Theory and Techniques, Jg. 69 (2021-03-01), S. 1684-1697 |
Veröffentlichung: | Institute of Electrical and Electronics Engineers (IEEE), 2021 |
Medientyp: | unknown |
ISSN: | 1557-9670 (print) ; 0018-9480 (print) |
DOI: | 10.1109/tmtt.2021.3053264 |
Schlagwort: |
|
Sonstiges: |
|