Gm-C biquad filter for low signal sensor applications

Arya, Richa; Oliveira, João P.

doi:10.1109/mixdes.2016.7529733

Cited by 14 publications

(2 citation statements)

References 12 publications

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“…Comparing to reported Gm-C topologies, the Si TFET implementation achieves less power than modern Low-Power circuit designs [18][19][20][21] which apply weak inversion operating points, voltage supply reduction and topology changes in order to achieve the low cutoff frequency required by the applications. The less power consuming implementation among the designs using conventional MOS device [18] is at least 1.4× higher than the Si TFET Gm-C filter.…”

Section: Gm-c Filter Designmentioning

confidence: 99%

Experimental silicon tunnel-FET device model applied to design a Gm-C filter

Rangel¹,

Agopian²,

Martino³

2020

Semicond. Sci. Technol.

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This work presents the design of a Gm-C filter using experimental data of a silicon tunneling field effect transistors (TFET) device. The application takes advantage of the low g m of a Si TFET device, resulting in an optimized low cutoff frequency filter, desired, for example, in biomedical applications.A look-up table model is used, with the experimental device data as input, which is reported to have an accurate response comparing to the measurements.The design of an operational amplifier circuit, the main part of a Gm-C filter, is presented, where around 100 dB voltage gain with two-stage topology is obtained. The filter showed a 100 Hz cutoff frequency response with 36 nW pole −1 power consumption, which represents a significant improvement in comparison to recently reported designs using CMOS technology.

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Section: Gm-c Filter Designmentioning

confidence: 99%

Experimental silicon tunnel-FET device model applied to design a Gm-C filter

Rangel¹,

Agopian²,

Martino³

2020

Semicond. Sci. Technol.

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“…The other two special types of notch biquadratic filter are LPN and HPN biquadratic filters [47], [48], [49]. Active biquadratic filters can find many applications in sensor, biomedical, video, and audio crossover network applications [50], [51], [52], [53], [54], [55], [56]. For example, a two-way network divides the bass and high frequency ranges between two speakers [57], while a threeway network divides the bass, midrange and high frequency ranges between three speakers [58], thus requiring the design and implementation of electronically adjustable LP, HP, and BP filters from the same configuration.…”

Section: Introductionmentioning

confidence: 99%

Two New and Improved Electronically Adjustable Voltage-Mode Multifunction Biquadratic Filters With Independent Control of Band-Pass, High-Pass, and Low-Pass/Regular Notch Filter Gains

et al. 2023

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In this study, two new and improved electronically adjustable voltage-mode (VM) biquadratic filters using three off-the-shelf LT1228 integrated circuits (ICs), two grounded capacitors (GCs), and six resistors are proposed for independent control of the band-pass (BP), high-pass (HP), and low-pass/regular notch (LPN/RN) filter gains. Each proposed electronically adjustable VM multifunction biquadratic filter has one input and six output voltages, enabling simultaneous realization of one low-pass (LP), two BP, two HP, and one LPN/RN filtering responses from the same configuration. Each filter parameter, namely the pole angular frequency (ω o ) and quality factor (Q), can be electronically controlled and orthogonally adjusted by the corresponding LT1228 bias current I B . In special cases, the parameters of ω o and Q can be electronically controlled and independently adjusted. Each electronically adjustable VM multifunction biquadratic filter has one high input impedance and three low output impedances for independent control of BP, HP, and LPN/RN filter gains. Due to its one high input impedance and three low output impedances, each proposed filter is suitable for cascaded VM circuits without external voltage buffers. Pspice simulations are used to verify the theoretical structure analysis of each proposed LT1228-based electronically adjustable VM multifunction biquadratic filter. Furthermore, experimental tests are performed using three off-theshelf LT1228 ICs, and several passive components to verify and evaluate the performance of each proposed LT1228-based biquadratic filter.INDEX TERMS LT1228, analog circuit design, integrated circuits, voltage-mode, filters.

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A 0.3‐V, 2.4‐nW, and 100‐Hz fourth‐order LPF for ECG signal processing

Rao

Sreenivasulu

Rekha

et al. 2020

Circuit Theory & Apps

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Summary An ultra‐low voltage, low power bulk‐driven voltage follower (VF) is proposed in this paper. Further, it is exploited to design a fourth‐order low‐pass filter (LPF) for electrocardiogram (ECG) signal processing. The filter is designed in UMC 180‐nm CMOS technology and operates with an ultra‐low supply voltage of 0.3 V. It consumes an extremely low power of 2.4 nW for a cutoff frequency of 100 Hz. Results of post‐layout simulation show that the proposed filter provides a dynamic range (DR) of 51.6 dB even from a 0.3‐V supply voltage. The filter achieves a Figure‐of‐merit (FoM) of 4.7 × 10−15, which is better than many designs listed in the literature.

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Gm-C biquad filter for low signal sensor applications

Cited by 14 publications

References 12 publications

Experimental silicon tunnel-FET device model applied to design a Gm-C filter

Experimental silicon tunnel-FET device model applied to design a Gm-C filter

Two New and Improved Electronically Adjustable Voltage-Mode Multifunction Biquadratic Filters With Independent Control of Band-Pass, High-Pass, and Low-Pass/Regular Notch Filter Gains

A 0.3‐V, 2.4‐nW, and 100‐Hz fourth‐order LPF for ECG signal processing

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