Universal Current-Mode Filters Based on OTA and MO-CCCA

Li, Yi; Wang, Chunhua; Zhu, Baihui; Hu, Zhenhua

doi:10.1080/03772063.2017.1381575

Cited by 9 publications

(6 citation statements)

References 21 publications

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“…Also, in general, they need lower supply voltage than their VM counterparts 10 . In this respect, there are some filtering architectures in CM that are reported in previous studies 10–23 …”

Section: Introductionmentioning

confidence: 97%

“…10 In this respect, there are some filtering architectures in CM that are reported in previous studies. [10][11][12][13][14][15][16][17][18][19][20][21][22][23] There are some published works taking advantage of active elements with external passive components in previous studies. [10][11][12][13][14][15][16][17][18][19][20][21][22][23] They suffer from large chip area, power consumption, and complexity problems.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][13][14][15][16][17][18][19][20][21][22][23] There are some published works taking advantage of active elements with external passive components in previous studies. [10][11][12][13][14][15][16][17][18][19][20][21][22][23] They suffer from large chip area, power consumption, and complexity problems. In this respect, center frequency of the filters employing active elements goes up at the expense of huge power dissipation.…”

Section: Introductionmentioning

confidence: 99%

“…There are some published works taking advantage of active elements with external passive components in previous studies 10–23 . They suffer from large chip area, power consumption, and complexity problems.…”

Section: Introductionmentioning

confidence: 99%

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A current‐mode MOSFET‐C analog filter for the high‐frequency band applications

Ozenli

Yeşil

Kuntman

2021

Circuit Theory & Apps

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Summary In this work, a novel current‐mode filter is presented including a PMOS grounded capacitor and a metal insulator metal structure (MIM‐cap). Proposed filter's cut‐off frequency can be easily adjusted from 10 up to 35 MHz. The wide tuning range of the proposed filter is designed to cover the need of baseband filter in the high‐frequency band and wireless applications such as CDMA, IEEE802.11a/g, IEEE 802.11b, and IEEE 802.11n. In addition, the proposed filter is designed by using a design methodology employing polynomial regressive models of small signal parameters of transistors to provide design accuracy as high as possible. Designed filter structure has layout with 52.1 μm × 62.6 μm chip area, and post‐layout simulations are given extensively to prove performance of the filter. Furthermore, 1‐dB compression point and IIP3 analyses are highlighted to observe linearity of band‐pass output of the filter structure. Also, input‐referred noise characteristics of the filter outputs are investigated to overcome thermal noise effects worsening the performance for a wide range of operating frequency interval. Provided results show that the proposed filter scheme brings a promising opportunity to designers for the high‐frequency region operations.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A current‐mode MOSFET‐C analog filter for the high‐frequency band applications

Ozenli

Yeşil

Kuntman

2021

Circuit Theory & Apps

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“…Fortunately, if one designs an opamp-RC filter with stable and high Q factor, such a topology can be transformed to a Gm-C one that can work in voltage-mode or current-mode, as shown in the work by the authors of [10]. For instance, some recent efforts on designing BPF responses work in current-mode, like in works by the authors of [11,12]; in voltage-mode, like in works by the authors of [13,14]; or apply modern active devices, like in works by the authors of [15][16][17]. Also, other efforts are oriented to provide reconfigurability and tune-ability at the same time and designing fractional-order circuits as in the work by the authors of [18].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Q-Factor in a Biquadratic Bandpass Filter Implemented with Opamps

et al. 2019

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Active filter design is a mature topic that provides good solutions that can be implemented using discrete devices or integrated circuit technology. For instance, when the filter topologies are implemented using commercially available operational amplifiers (opamps), one can explore varying circuit parameters to tune the central frequency or enhance the quality (Q) factor. We show the addition of a feedback loop in the signal flow graph of a biquadratic filter topology, which enhances Q and highlights that a sensitivity analysis can be performed to identify which circuit elements influence central frequency, Q, or both. In this manner, we show the opamp-based implementation of a biquadratic bandpass filter, in which Q is enhanced through performing a sensitivity analysis for each circuit element. Equations for the central frequency and Q are provided to observe that there is not a direct parameter that enhances them, but we show that from sensitivity analysis one can identify the circuit elements that better enhance Q-factor.

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