A New Ultra-Low-Power High-Order Universal OTA-C Filter Based on CMOS Double Inverters in the Subthreshold Region

Namdari, Ali; Dolatshahi, Mehdi; Aghababaei Horestani, Mohammad

doi:10.1007/s00034-023-02401-7

Cited by 7 publications

(3 citation statements)

References 37 publications

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“…Industries widely employ filtering methods across various domains such as telecommunications, biomedical, signal processing, and testing. Optimal techniques, ensuring high speed and minimal distortion, are crucial in both analog and digital applications [4][5][6].…”

Section: Industrial Applicationsmentioning

confidence: 99%

An Experimental Electronic Board ADF339 for Analog and FPGA-Based Digital Filtration of Measurement Signals

Pałczyński,

Olejnik

2024

Electronics

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This work introduces and examines a new programmable electronic system, Board ADF339, designed for filtering analog measurement signals of low frequencies. The system operates in a mixed mode in collaboration with a digital controller implemented on the myRIO-1900 FPGA module. It enables the digital selection of the type and frequency settings of the UAF42 integrated circuit. In the technical implementation section, electronic filter and phase shifter circuit diagrams are presented, along with the digital counterpart of the analog filter. Tests of this system were conducted on signals generated using a function generator, which was followed by the filtration of signals occurring in real laboratory setups. A series of real responses from three different laboratory systems and a measurement system utilizing LabVIEW FPGA virtual instruments are demonstrated. After computing SNR indicators for noisy waveforms, the application scope and usability of the board are highlighted.

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Section: Industrial Applicationsmentioning

confidence: 99%

An Experimental Electronic Board ADF339 for Analog and FPGA-Based Digital Filtration of Measurement Signals

Pałczyński,

Olejnik

2024

Electronics

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“…Nowadays, low-voltage low-power filters are required for biomedical applications, such as biosensors [3]. Universal filters using OTAs operating with a low supply voltage and with low power consumption are available in the literature [42][43][44][45][46][47]. However, these configurations cannot benefit from independent and electronic control of the quality factor and the natural frequency and cannot provide a high-quality (high-Q) filter.…”

Section: Introductionmentioning

confidence: 99%

1 V Tunable High-Quality Universal Filter Using Multiple-Input Operational Transconductance Amplifiers

Kumngern,

Khateb,

Kulej

et al. 2024

Sensors

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This paper presents a new multiple-input single-output voltage-mode universal filter employing four multiple-input operational transconductance amplifiers (MI-OTAs) and three grounded capacitors suitable for low-voltage low-frequency applications. The quality factor (Q) of the filter functions can be tuned by both the capacitance ratio and the transconductance ratio. The multiple inputs of the OTA are realized using the bulk-driven multiple-input MOS transistor technique. The MI-OTA-based filter can also offer many filtering functions without additional circuitry requirements, such as an inverting amplifier to generate an inverted input signal. The proposed filter can simultaneously realize low-pass, high-pass, band-pass, band-stop, and all-pass responses, covering both non-inverting and inverting transfer functions in a single topology. The natural frequency and the quality factors of all the filtering functions can be controlled independently. The natural frequency can also be electronically controlled by tuning the transconductances of the OTAs. The proposed filter uses a 1 V supply voltage, consumes 120 μW of power for a 5 μA setting current, offers 40 dB of dynamic range and has a third intermodulation distortion of −43.6 dB. The performances of the proposed circuit were simulated using a 0.18 μm TSMC CMOS process in the Cadence Virtuoso System Design Platform to confirm the performance of the topology.

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“…However, these mixed-mode universal filters are rather high-power consumption. Low-voltage low-power mixed-mode universal filters have been proposed in [12][13][14][15][16]. However, these mixed-mode universal filters do not provide full capability of mixed-mode universal filters, namely each VM, CM, TAM, and TIM does not provide both noninverting and inverting transfer functions of LPF, HPF, BPF, BSF, and APF.…”

Section: Introductionmentioning

confidence: 99%

Low-Voltage Mixed-Mode Analog Filter Using Multiple-Input Multiple-Output Operational Transconductance Amplifiers

Kumngern,

Khateb,

Kulej

2024

IEEE Access

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This paper presents a novel mixed-mode, low-power, 1 V analog filter that uses multiple-input multiple-output operational transconductance amplifiers (MIMO-OTAs). This filter uses four OTAs, two grounded capacitors, and one grounded resistor and offers four modes, namely voltage, current, transconductance, and transimpedance modes. Each mode of operation provides non-inverting and inverting low-pass, high-pass, band-pass, band-stop, and all-pass filter transfer functions (10 transfer functions). Thus, in four operating modes, the designed filter offers 40 transfer functions, which is the full capability of a mixed universal filter. The natural frequency of all filter functions can be electronically controlled. To obtain the multi-input OTA, the multiple-input bulk-driven MOS transistor (MIBD-MOST) technique is used. This technique can reduce the number of MOS input differential pairs and the supply voltage. The active mixedmode filter was simulated using a CMOS TSMC 0.18 m process in the Cadence Virtuoso ADE Suite. The simulation results confirm the performance of the proposed filter.

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A New Ultra-Low-Power High-Order Universal OTA-C Filter Based on CMOS Double Inverters in the Subthreshold Region

Cited by 7 publications

References 37 publications

An Experimental Electronic Board ADF339 for Analog and FPGA-Based Digital Filtration of Measurement Signals

An Experimental Electronic Board ADF339 for Analog and FPGA-Based Digital Filtration of Measurement Signals

1 V Tunable High-Quality Universal Filter Using Multiple-Input Operational Transconductance Amplifiers

Low-Voltage Mixed-Mode Analog Filter Using Multiple-Input Multiple-Output Operational Transconductance Amplifiers

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