An ultra-low-power precision rectifier for biomedical sensors interfacing

Rodriguez‐Villegas, Esther; Corbishley, P.; Luján-Martínez, C.; Sánchez-Rodríguez, T.

doi:10.1016/j.sna.2009.05.020

Cited by 12 publications

(6 citation statements)

References 20 publications

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“…The values of AVR and RMSE achieved confirm the quality of the rectification process of the proposed rectifier. Table 3 provides comparison of the proposed rectifier with three half wave rectifiers introduced in [30][31][32]. To compare their performance figure of merit FOM is provided, which indicates the efficiency of the design regarding the maximum allowable input swing over voltage supply.…”

Section: Simulation Resultsmentioning

confidence: 99%

Ultra-Low-Voltage Low-Power Bulk-Driven Quasi-Floating-Gate Operational Transconductance Amplifier

Alsibai

Dabbous

2014

Advances in Electronics

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A new ultra-low-voltage (LV) low-power (LP) bulk-driven quasi-floating-gate (BD-QFG) operational transconductance amplifier (OTA) is presented in this paper. The proposed circuit is designed using 0.18 μm CMOS technology. A supply voltage of ±0.3 V and a quiescent bias current of 5 μA are used. The PSpice simulation result shows that the power consumption of the proposed BD-QFG OTA is 13.4 μW. Thus, the circuit is suitable for low-power applications. In order to confirm that the proposed BD-QFG OTA can be used in analog signal processing, a BD-QFG OTA-based diodeless precision rectifier is designed as an example application. This rectifier employs only two BD-QFG OTAs and consumes only 26.8 μW.

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Section: Simulation Resultsmentioning

confidence: 99%

Ultra-Low-Voltage Low-Power Bulk-Driven Quasi-Floating-Gate Operational Transconductance Amplifier

Alsibai

Dabbous

2014

Advances in Electronics

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“…Furthermore, with the flexibility in design trade-offs between LV LP and an acceptable bandwidth, the performance of the proposed DVCC is suitable for many applications, e.g. implantable biomedical devices where the processing signal possess a low amplitude and frequency in the range of millivolt and kilohertz, respectively [3][4][5][6][7].…”

Section: Gdmentioning

confidence: 99%

“…This issue can be translated to many undesirable traits such as poor gain-bandwidth product, low frequency response and low speed [2]. However, a multitude of circuits can exploit these disadvantages; biomedical, telemetry, real time speech recognition and other systems are utilizing signals with low frequency response property [3][4][5][6][7]. transconductance in comparison to the conventional gate transconductance, resulting in gainbandwidth product degradation.…”

Section: Introductionmentioning

confidence: 99%

Quadrature oscillator based on novel low-voltage ultra-low-power quasi-floating-gate DVCC

et al. 2017

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In this work, a new realization topology of the low-voltage ultra-low-power quadrature oscillator is presented. This quadrature oscillator utilizes only two active elements, namely differential voltage current conveyor (DVCC), and five passive ones, all of them are grounded, which is recommended for the integrated circuit implementation. The DVCC is based on quasi-floating-gate MOS transistor, which is a distinct technique from the conventional one, featuring with operation at low-voltage and ultra-low-power conditions; hence the proposed DVCC works with low supply voltage of ± 400 mV and consumes power of merely 6.6 µW. Thanks to these features the total power dissipation of the oscillator is only 0.28 mW. The simulation results using 0.18 µm TSMC CMOS technology are included in order to prove the design correctness.

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“…The problem is challenging to such an extent that there are several published works and some patents proposing different rectifier topologies, most using either diodes and operational amplifiers, or a comparator or an equivalent structure to change an amplifier's configuration between ±1 gain depending on the sign of the input signal. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] In the present work, the development of precision CMOS-integrated rectifiers with a current consumption down to a few nanoampere and using no diodes is presented, including measurement results on fabricated CMOS-integrated circuits. First, a rectifier transconductor named G mRect is shown, consuming only a 120-nA supply current.…”

Section: Introductionmentioning

confidence: 99%

Nano–power‐integrated precision rectifiers for implantable medical devices

Alvarez

Arnaud

Gak

et al. 2020

Circuit Theory & Apps

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Summary Two ultralow power CMOS full‐wave precision rectifiers aimed at analog signal processing in implantable medical devices are presented. The rectifiers require no diodes and utilize a single or two transconductors (operational transconductance amplifier [OTA]) as the active element, to reduce power consumption to a minimum. First, a voltage‐to‐current rectifier consuming only a 120‐nA supply current is presented and later is used to estimate the average AC amplitude of a piezoelectric accelerometer output (0.5–15‐Hz bandwidth) in an adaptive pacemaker. This rectifier is based on a linearized transconductor and a comparator to toggle the output current sign. Then, a novel voltage rectifier consuming less than 10 nA is presented based on a single nanopower OTA and a pass transistor and later is utilized in a pacemaker's cardiac sensing channel (60–200‐Hz bandwidth) circuit, incorporating the rectifier to detect positive and negative voltage signal spikes. Both rectifiers were designed in a 0.6‐μm CMOS technology, fabricated, and tested, and the measurement results closely fit the expected performance.

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An ultra-low-power precision rectifier for biomedical sensors interfacing

Cited by 12 publications

References 20 publications

Ultra-Low-Voltage Low-Power Bulk-Driven Quasi-Floating-Gate Operational Transconductance Amplifier

Ultra-Low-Voltage Low-Power Bulk-Driven Quasi-Floating-Gate Operational Transconductance Amplifier

Quadrature oscillator based on novel low-voltage ultra-low-power quasi-floating-gate DVCC

Nano–power‐integrated precision rectifiers for implantable medical devices

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