A 1-V, 6-nW programmable 4th-order bandpass filter for biomedical applications

Sundarasaradula, Yuwadee; Thanachayanont, A.

doi:10.1007/s10470-016-0792-3

Cited by 8 publications

(5 citation statements)

References 12 publications

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“…Nowadays, the low-power second-order filters can be used to realize high-order filters for biomedical and biosensor applications such as fourth-order low-pass filters [32]- [35] and band-pass filters [36]- [38] as well as the low-frequency oscillators that can be applied in the biomedical systems [39], [41]. The LPF can be applied to bio-signal acquisition system [32], BPF can be applied to bionic ears [59], BSF can reduce the effect of the power line interference [60], APF can be used to realize audio delay line for use in hearing aids [61], HPF, LPF and BSF are used for signal conditioning for biosensors [62].…”

Section: Introductionmentioning

confidence: 99%

Electronically Tunable Universal Filter and Quadrature Oscillator Using Low-Voltage Differential Difference Transconductance Amplifiers

et al. 2022

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This paper presents a new electronically tunable universal filter and quadrature oscillator for low frequency biomedical and biosensor applications employing low-voltage differential difference transconductance amplifier (DDTA). The DDTA CMOS structure uses 0.5 V of supply voltage and consumes 277 nW of power. Unlike the previous universal filters, the proposed filter provides many transfer functions of the standard five transfer functions such as low-pass, high-pass, band-pass, band-stop and all-pass with both unity and controlled voltage gains as well as both inverting and non-inverting transfer functions. The natural frequency and the voltage gain of the five standard transfer functions can be controlled electronically. For the band-pass filter, the third intermodulation distortion (IMD 3 ) was 0.37% for 20 mV pp input signal while the output integrated noise was 61.37 µV. The dynamic range (DR) was 53.27 dB for 1% IMD 3 . The quadrature oscillator has electronically and orthogonal control of the condition and frequency of oscillation. The proposed circuit and its applications were designed and verified via Cadence simulator tool using 0.13 µm UMC CMOS technology. Further, the circuit was evaluated by PSPICE simulation and experiment test using commercial OTA LM13700.

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Section: Introductionmentioning

confidence: 99%

Electronically Tunable Universal Filter and Quadrature Oscillator Using Low-Voltage Differential Difference Transconductance Amplifiers

et al. 2022

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“…Some low-voltage and low-power analog devices using non-conventional techniques are reported in literature, including the op-amp [6], [7], [8], [9], OTA [10], [11], [12], [13], [14], DDA [15], [16], [17], [18], [20], [39], [40], and second-generation current conveyor (CCII) [19], [20], [21], [22]. Low-voltage and low-power analog circuits can be applied to biosignal processing; analog filters are an example of this application [23], [24], [25], [26], [27], [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], [38]. In [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], and [38], BPFs suitable for applications in biomedical systems have been proposed.…”

Section: Introductionmentioning

confidence: 99%

“…Low-voltage and low-power analog circuits can be applied to biosignal processing; analog filters are an example of this application [23], [24], [25], [26], [27], [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], [38]. In [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], and [38], BPFs suitable for applications in biomedical systems have been proposed. However, some of these BPFs suffer from highpower consumption [28], [29], [30], [31], [32], [35], [36], [37], [38], cannot control voltage gain [30], [31], [32], [33], [34], [35], [37], [38], or cannot control the higher and lower cutoff frequencies [29], [30], [31],…”

Section: Introductionmentioning

confidence: 99%

“…In [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], and [38], BPFs suitable for applications in biomedical systems have been proposed. However, some of these BPFs suffer from highpower consumption [28], [29], [30], [31], [32], [35], [36], [37], [38], cannot control voltage gain [30], [31], [32], [33], [34], [35], [37], [38], or cannot control the higher and lower cutoff frequencies [29], [30], [31], [32], [33], [34], [35], [36], [37], [38].…”

Section: Introductionmentioning

confidence: 99%

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31.3 nW, 0.5 V Bulk-Driven OTA for Biosignal Processing

2023

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This paper presents a new extremely low-voltage low-power bulk-driven (BD) operational transconductance amplifier (OTA) realized for low frequency biosignal processing. The CMOS structure of the OTA utilizes bulk-driven and self-cascode techniques in the subthreshold region, supporting the operation with the supply voltage (V DD ) as the threshold voltage (V TH ) of a single MOS transistor, i.e., V DD = V TH = 0.5 V, while offering nano power consumption (31.3 nW for 15 nA nominal setting current). Using the extremely low-voltage and low-power OTA in biosignal processing enables extending the lifetime of applications that are powered by battery or energy harvesting sources. The OTA has a 54.7 dB low frequency gain, 6.18 kHz gain bandwidth and 75 • phase margin at 15 pF load capacitance. The proposed OTA has been used to realize a bandpass filter (BPF) with adjustable gain for electrocardiogram (ECG) signal processing. The higher cutoff frequency of the BPF is adjustable electronically by a setting current and the BPF's gain can be adjusted by capacitors value. The total harmonic distortion (THD) of the BPF is −53.56 dB, the input integrated input-referred voltage noise is 17.9 µV rms , the common mode rejection ratio (CMRR) is 75 dB and the power supply rejection ratio (PSRR) is 87.7 dB. The BPF was designed in the Cadence program using 0.18 µm CMOS technology from TSMC. The simulation results agree with the presented theory.INDEX TERMS Operational transconductance amplifier (OTA), bulk-driven, band-pass filter, low-voltage, low-power CMOS. FABIAN KHATEB received the M.Sc. and Ph.D. degrees in electrical engineering and communication and the M.Sc. and Ph.D. degrees in business and management from the

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“…In biomedical applications, there is a rapid growth of portable devices which essentially require ultra-low power filters for a prolonged battery life and sluggish discharging rates (1, 2). For these integrated biomedical applications like, Electrocardiography (ECG || 0.01-250 Hz) (3), Electroencephalography (EEG || 0.5-100 Hz) (4), and breathing detection (0.1-100 Hz) (5), a filter circuit plays an important role in deciding the cut-off frequency (fc) as well as for removal of out-of-band noise components. In addition to sharp fc and high selectivity, the LPF circuit should consume low power ( nW), have large Dynamic Range (DR) (>45 dB), and carry low noise (< 150 µVrms) (6,7).…”

Section: Introductionmentioning

confidence: 99%

Design of a Low-Noise Low-Power Fourth Order Complementary Super Source Follower Filter for EEG Applications

Thakur

Sharma

2022

ECS Trans.

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Design of a filter for biomedical application is a challenging task owing to its low-power and low-noise values introduced at low frequencies. This paper describes the design of a Complementary Super Source Follower (CSSF-C) Low Pass Filter (LPF) circuit and the same has been compared with Complementary Source Follower (CSF-C) LPF targeted for the detection of EEG signals. Simulated results obtained in Cadence Analog Design Environment using CMOS 0.18 µm technology node shows the CSSF-C LPF circuit emulates gain of -528 mdB, bandwidth of 100 Hz, power consumption of 12.6 nW from 0.5 V supply voltage. Further, the proposed LPF circuit is capable of achieving Dynamic Range (DR) of 63 dB with an Input Referred Noise (IRN) of 36 µVrms. The proposed CSSF-C LPF is expected to improve the quality of acquired EEG signals.

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A 1-V, 6-nW programmable 4th-order bandpass filter for biomedical applications

Cited by 8 publications

References 12 publications

Electronically Tunable Universal Filter and Quadrature Oscillator Using Low-Voltage Differential Difference Transconductance Amplifiers

Electronically Tunable Universal Filter and Quadrature Oscillator Using Low-Voltage Differential Difference Transconductance Amplifiers

31.3 nW, 0.5 V Bulk-Driven OTA for Biosignal Processing

Design of a Low-Noise Low-Power Fourth Order Complementary Super Source Follower Filter for EEG Applications

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