A Gate-Leakage Insensitive 0.7-V 233-nW ECG Amplifier using Non-Feedback PMOS Pseudo-Resistors in 0.13-μm N-well CMOS

Um, Ji‐Yong; Sim, Jae‐Yoon; Park, Hong-June

doi:10.5573/jsts.2010.10.4.309

Cited by 10 publications

(9 citation statements)

References 10 publications

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“…The voltage source V ctrl in Figure 6 is implemented by the structure shown in Figure 7 7 . This structure provides a floating voltage source which is required in the proposed pseudoresistor to make it tunable and have a tunable low‐cutoff frequency.…”

Section: Amplifier Designmentioning

confidence: 99%

“…This results in a large silicon area on the chip that can be a major drawback. Therefore, two‐stage structures have been introduced in previous studies, 5–7 in which the desired gain is achieved in two stages. Due to the high‐cutoff frequency that is set in the first stage of the two‐stage structures, a large load or compensation capacitor is required for this stage 8 .…”

Section: Introductionmentioning

confidence: 99%

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An ultra‐low‐power, low‐noise tunable electrocardiogram amplifier

Saeidian

Ashraf

2020

Circuit Theory & Apps

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Summary The objective of this research work is to propose an innovative low‐power, low‐noise, tunable three‐stage capacitive instrumentation amplifier, capable of receiving and magnifying the electrocardiogram (ECG) signals. This is done by adding an extra stage to the second stage of the conventional capacitive instrumentation amplifier. The results show similar midband gain with lesser capacitor usage and smaller chip occupancy area with provision of concurrent tunable gain and bandwidth. The proposed amplifier is designed and implemented using TSMC 0.18‐μm CMOS technology scale under a 1‐V supply voltage with the simulation process carried out using Cadence Virtuoso tool. Post‐layout simulation results show that the amplifier has a tunable midband gain of 55 to 65.6 dB, low‐cutoff frequency tuned from 377 mHz to 4.5 Hz and high‐cutoff frequency tuned from 86.8 to 263.6 Hz. The simulated value of the input‐referred noise and noise efficiency factor (NEF) of the amplifier are 9.6 μVrms and 6.1, respectively, with the total power consumption of 71.2 nW.

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Section: Amplifier Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An ultra‐low‐power, low‐noise tunable electrocardiogram amplifier

Saeidian

Ashraf

2020

Circuit Theory & Apps

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“…This provided power consumption = 1.47 μ W and CMRR = 82 dB [56]. An IA with series combination of two OTAs (one is preamplifier and second is variable-gain amplifier) provided power consumption = 233 nW, bandwidth = 21 Hz, gain = 44.2 dB, and CMRR = 80 dB [60]. Flicker noise was removed by both chopper stabilised front end amplifier [121] and chopped capacitively coupled IA (CCIA) [122, 123].…”

Section: Designing Of External Cardiac Loop Recordermentioning

confidence: 99%

An Engineering Perspective of External Cardiac Loop Recorder: A Systematic Review

Srinivasulu

Sriraam

2016

Journal of Medical Engineering

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External cardiac loop recorder (ELR) is a kind of ECG monitoring system that records cardiac activities of a subject continuously for a long time. When the heart palpitations are not the frequent and nonspecific character, it is difficult to diagnose the disease. In such a case, ELR is used for long-term monitoring of heart signal of the patient. But the cost of ELR is very high. Therefore, it is not prominently available in developing countries like India. Since the design of ELR includes the ECG electrodes, instrumentation amplifier, analog to digital converter, and signal processing unit, a comparative review of each part of the ELR is presented in this paper in order to design a cost effective, low power, and compact kind of ELR. This review will also give different choices available for selecting and designing each part of the ELR system. Finally, the review will suggest the better choice for designing a cost effective external cardiac loop recorder that helps to make it available even for rural people in India.

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“…In the ampli er of Figure 6, the following points are worth explaining: , is more linear than gate-source shortcircuited structure. Resistance value of the order of 10 12 can be achieved if the gate-source voltage is near zero in the diode structure [8]; Instrumentation ampli er is built by three Operational Transconductance Ampli ers (OTA). OTA structure is illustrated in Figure 8.…”

Section: Instrumentation Ampli Er Designmentioning

confidence: 99%

MOSCAP linearization and its application in low-power electrocardiogram amplier

Ghamati

Maymandi-Nejad

2016

Scientia Iranica

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Considerable area occupied by capacitors is one of the main issues in the design of many ICs, especially in biomedical applications. MIM capacitor can be replaced by the MOSCAP to reduce the chip area and cost. Although the MOSCAP shows a non-linear behavior, linearization can be performed to some extent using serial and parallel compensation. In this paper, a new approach is presented, by which the impact of MOSCAP non-linearity on the THD of the circuit is reduced. The proposed technique is used in an electrocardiogram ampli er. The appropriate structure for each MOSCAP of the ampli er is selected by analyzing the non-linear e ect of the MOSCAPs on the ampli er's output linearity. The non-linear e ect of MOSCAP is reduced by choosing the appropriate slopes in the MOSCAP capacitance-voltage curve. As a result, the occupied area of the ampli er is reduced to less than 10 percent of the area of the ampli er with MIM capacitors, while the THD is not changed considerably. The output THD is 0.65% at 60 Hz and the total power consumption is 72 nW.

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A Gate-Leakage Insensitive 0.7-V 233-nW ECG Amplifier using Non-Feedback PMOS Pseudo-Resistors in 0.13-μm N-well CMOS

Cited by 10 publications

References 10 publications

An ultra‐low‐power, low‐noise tunable electrocardiogram amplifier

An ultra‐low‐power, low‐noise tunable electrocardiogram amplifier

An Engineering Perspective of External Cardiac Loop Recorder: A Systematic Review

MOSCAP linearization and its application in low-power electrocardiogram amplier

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