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Active Eight-Path Filter and LNA With Wide Channel Bandwidth and Center Frequency Tunability

Behmanesh, Baktash LU orcid and Atarodi, Seyed Mojtaba (2017) In IEEE Transactions on Microwave Theory and Techniques 65(11). p.4715-4723
Abstract
This paper presents a differential eight-path bandpass filter with tunable center frequency and bandwidth. Fully differential Miller compensated Butterworth Gm-C biquads are used to implement the active low-pass filters required in the structure of the eight-path filter. The -3-dB bandwidth of each Gm-C filter can be tuned from 2.5 to 51 MHz by means of six digital bits. The center frequency of the eight-path filter can be tuned from 100 MHz to 2 GHz by varying the frequency of the 12.5% duty cycle clocks applied to the gates of the switches in the filter. A wideband low-noise amplifier (LNA) is designed to precede the eight-path filter and acts as an active single-to-differential converter while providing a moderate voltage gain to... (More)
This paper presents a differential eight-path bandpass filter with tunable center frequency and bandwidth. Fully differential Miller compensated Butterworth Gm-C biquads are used to implement the active low-pass filters required in the structure of the eight-path filter. The -3-dB bandwidth of each Gm-C filter can be tuned from 2.5 to 51 MHz by means of six digital bits. The center frequency of the eight-path filter can be tuned from 100 MHz to 2 GHz by varying the frequency of the 12.5% duty cycle clocks applied to the gates of the switches in the filter. A wideband low-noise amplifier (LNA) is designed to precede the eight-path filter and acts as an active single-to-differential converter while providing a moderate voltage gain to compensate for the noise produced by the eight-path filter. The LNA has a noise canceling common-gate common-source with 20 dB of gain and a noise figure (NF) of 1.8 dB. The filter and LNA are designed and fabricated in 180-nm CMOS process. The circuit operates in 100 MHz to 2 GHz frequency range, achieving a voltage gain of 19 dB and a total NF of 3.3 dB. The achieved out-of-band input third-order intercept point of the circuit is +23 dBm, and the power consumption of the filter is approximately 32.3 mW, while the LNA consumes 16.5 mW.
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author
and
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Transactions on Microwave Theory and Techniques
volume
65
issue
11
pages
4715 - 4723
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85020065608
ISSN
0018-9480
DOI
10.1109/TMTT.2017.2698466
language
English
LU publication?
no
id
bd85c85b-c4bc-48e4-af39-e8c516337eab
date added to LUP
2021-11-30 12:08:13
date last changed
2022-04-27 06:22:15
@article{bd85c85b-c4bc-48e4-af39-e8c516337eab,
  abstract     = {{This paper presents a differential eight-path bandpass filter with tunable center frequency and bandwidth. Fully differential Miller compensated Butterworth Gm-C biquads are used to implement the active low-pass filters required in the structure of the eight-path filter. The -3-dB bandwidth of each Gm-C filter can be tuned from 2.5 to 51 MHz by means of six digital bits. The center frequency of the eight-path filter can be tuned from 100 MHz to 2 GHz by varying the frequency of the 12.5% duty cycle clocks applied to the gates of the switches in the filter. A wideband low-noise amplifier (LNA) is designed to precede the eight-path filter and acts as an active single-to-differential converter while providing a moderate voltage gain to compensate for the noise produced by the eight-path filter. The LNA has a noise canceling common-gate common-source with 20 dB of gain and a noise figure (NF) of 1.8 dB. The filter and LNA are designed and fabricated in 180-nm CMOS process. The circuit operates in 100 MHz to 2 GHz frequency range, achieving a voltage gain of 19 dB and a total NF of 3.3 dB. The achieved out-of-band input third-order intercept point of the circuit is +23 dBm, and the power consumption of the filter is approximately 32.3 mW, while the LNA consumes 16.5 mW.<br/>}},
  author       = {{Behmanesh, Baktash and Atarodi, Seyed Mojtaba}},
  issn         = {{0018-9480}},
  language     = {{eng}},
  month        = {{05}},
  number       = {{11}},
  pages        = {{4715--4723}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Microwave Theory and Techniques}},
  title        = {{Active Eight-Path Filter and LNA With Wide Channel Bandwidth and Center Frequency Tunability}},
  url          = {{http://dx.doi.org/10.1109/TMTT.2017.2698466}},
  doi          = {{10.1109/TMTT.2017.2698466}},
  volume       = {{65}},
  year         = {{2017}},
}