A 13.56-MHz CMOS Active Rectifier With a Voltage Mode Switched-Offset Comparator for Implantable Medical Devices

The analysis of biomedical signals performs an important role in figuring out numerous issues in clinical science. Also, the urge to track biomedical signals in fitness and well-being control is progressively growing with the multiplied occurrence of persistent sicknesses over the last decade. By nature, the most of the real-time signals are analog. Hence, an Analog to digital converter (ADC) is required to transform the signal. In ADC architecture, the comparator is the essential block that performs a vital role and consumes greater power in ADC design. Numerous architectures for comparators relate to biomedical programs are mentioned in recent days. In this paper, the exceptional latest techniques of comparator designs are discussed with their key capabilities in conjunction with pros and cons.

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“…As discussed in ref. [8], the proposed comparator and controller are more suitable for Implantable Medical Devices. The method proposed in Ref.…”

Section: Literature Reviewmentioning

confidence: 98%

A Contemporary Survey on Low Power, High Speed Comparators for Bio-Medical Applications

Rajalakshmi

Rani

Anand

2021

Advances in Parallel Computing

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“…It can be simplified into a serial model constituted by an equivalent inductance L 1/2eq in serial with an equivalent resistance R 1/2eq , as shown in Fig. 6 by using (8) and (9) with C p 1 = C 1 or C p 2 = C 2 , the parasitic capacitances. The following development computes the inductance L = L 1 or L 2 and the stray capacitance C par = C 1 or C 2 that can then be substituted into (8) and (9).…”

Section: B Computation Of Planar Coils Inductancementioning

confidence: 99%

“…6 by using (8) and (9) with C p 1 = C 1 or C p 2 = C 2 , the parasitic capacitances. The following development computes the inductance L = L 1 or L 2 and the stray capacitance C par = C 1 or C 2 that can then be substituted into (8) and (9). If the considered application requires an extra parallel capacitance C 1b or C 2b for resonance or tuning, it can be added in C p 1 or C p 2 as proposed by (8).…”

Section: B Computation Of Planar Coils Inductancementioning

confidence: 99%

“…The design becomes now an optimization problem, where the objective is to maximize (15) by changing the geometry parameters and tuning capacitances, while meeting the constraints such that all distances must be positive and fit into normalized packaging. Additionally, the inductances and geometry parameters are linked together by (8), (9), (12), (17) - (34). Due to the number of turns having to be an integer, the obtained optimization problem is a Mixed Integer Non Linear Problem (MINLP) that can be implemented in any spreadsheet or optimization software (MATLAB, R or GAMS), and optimized using an appropriate non linear solver.…”

Section: Optimization Of the Efficiency Of A Wpdt Systemmentioning

confidence: 99%

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A Low Complexity Design Framework for NFC-RFID Inductive Coupled Antennas

et al. 2020

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Inductive Wireless Power and Data Transfer (WPDT) technology has become a vital enabler to the globalisation of Internet of Things. Driven by an increasing demand for data within applications and by the need to reduce the devices footprint by transmitting data and power with the same antenna, power transfer efficiency has become a barrier to WPDT systems' performance. To overcome the limitations of power transfer efficiency, current research focuses on the design of efficient integrated circuits and does not consider the challenges of inductive antennas' design and system integration. Hence, current system integration methods used in industry to design receivers for WPDT applications still require expensive experimental benchmarking of antennas. This paper introduces a new framework for inductive WPDT systems integration that focuses on the design of inductive coils and tuning capacitances. First, this framework proposes a new planar rectangular coil inductance formula that achieves an average error of 11% based on the testing of one hundred of coils, which out performs the current state of the art. Then, based on a detailed electrical model of both transmitter and receiver of WPDT systems, our design framework computes the coils geometric parameters and tuning capacitances that will optimize the overall efficiency of the WPDT system. Unlike state of the art design approaches, the main advantage of this framework is that it does not require expensive benchmarking of inductive antennas to find the optimal antenna. Verification of our design framework was achieved through a comparative analysis for Very High Bit Rate 13.56 MHz RFID applications. Results indicate an improvement of more than 15% in overall system power transfer efficiency compared to current state of the art methods within a comparatively more cost effective framework. A sensitivity analysis provides an insight and practical guide to implications of manufacturing variances in component parameters.

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“…These studies differ according to rectification methods, operation voltage, and frequency. The rectification methods are called voltage mode (VM) rectifiers [12], voltage doublers [13], passive rectification, half wave rectifiers and current mode (CM) rectifiers [14]. In VM operation, RX coil and the resonance capacitance CR construct an LC tank in the receiver.…”

Section: Introductionmentioning

confidence: 99%

13.56 MHz Triple Mode Rectifier Circuit With Extended Coupling Range for Wirelessly Powered Implantable Medical Devices

Engur

Yigit

Külah

2021

IEEE Trans. Biomed. Circuits Syst.

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A 13.56-MHz CMOS Active Rectifier With a Voltage Mode Switched-Offset Comparator for Implantable Medical Devices

Cited by 37 publications

References 18 publications

A Contemporary Survey on Low Power, High Speed Comparators for Bio-Medical Applications

A Contemporary Survey on Low Power, High Speed Comparators for Bio-Medical Applications

A Low Complexity Design Framework for NFC-RFID Inductive Coupled Antennas

13.56 MHz Triple Mode Rectifier Circuit With Extended Coupling Range for Wirelessly Powered Implantable Medical Devices

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