In this paper, we present a novel instrumentation amplifier (INA) topology for mobile bio-medical data acquisition platforms. The proposed INA features PMOS-NMOS complimentary transistor input pair biased in sub-threshold region to effectively boost the transconductance of and reduce referred noise. There are two embedded common-mode feedback circuits which help establish voltages without consuming extra power. One is at output first stage (i.e. drain connection transistors) other final...

Spiking neural networks (SNNs) implemented in neuromorphic computing architectures promise a high degree of bio-plausibility and energy efficiency compared to the artificial network (ANN). Thus, SNN-based spiking associative memories are preferred for capacity, area, energy-efficient (NAMs). While most previously published works focused on ANN-based NAM, this work implements full CMOS circuit memristor crossbar-based NAM first time. Instead using any software-based memristive SPICE model or...

This paper presents a low-power integrated wireless telemetry system (Bio-WiTel) for healthcare applications in 401–406 MHz frequency band of medical device radiocommunication (MedRadio) spectrum. In this paper, necessary design considerations short-range (upto 3 m) communication biosignals are presented. These help greatly making important decisions, which eventually lead to simple, low power, robust, and reliable implementation. Transmitter (TX) receiver (RX) Bio-WiTel have been fabricated...

This paper proposes a complete CMOS realized neuromorphic system for pattern recognition having CMOS-based memristor emulators as synaptic circuits. The crossbar array of the is modeled by considering emulator circuit's area to determine spacing between interconnects. interconnect parasitics are obtained from ANSYS Q3D extractor. Parasitics extracted also validated using analytical model. A architecture with parasitic components and will provide an understanding behavior can be used...

This paper presents a double cross-coupled delay cell (DCC-Delay cell) incorporated in two-stage ring voltage-controlled oscillator (RVCO) that enhances its operating frequency. The DCC-Delay employs two transistor pairs, one pull-up network and the other pull-down network. design configuration effectively reduces time required for discharging output node, allowing higher frequencies. RVCO's frequency is controlled by PMOS transistor-based capacitance between nodes. Simulations were...

In this paper a balanced CMOS operational amplifier which has higher electromagnetic interference (EMI) immunity compared to double differential and standard Miller amplifier, been introduced. The proposed better EMI immunity, from 1 MHz - GHz, by keeping specifications such as gain, -3 dB bandwidth, phase margin, power supply rejection unity gain frequency same in the amplifier. Analysis simulation results are when an signal of 1.1 Vpp applied at input terminal. show that EMI-induced offset...

A differential delay cell without a cross-coupled latch is proposed for two-stage ring voltage-controlled oscillator (RVCO). In the (PDC), an RC network used in place of to exhibit negative conductance. It reduces power consumption RVCO significantly. Two paths from output node discharging current are added PDC. time which enhances operating frequency by almost 50%. The PDC utilizes reduce peak-to-peak jitter making noise sharp, similar impulse function. This design approach effectively...

Two-dimensional MoS <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> -based memristors have demonstrated remarkable performance attributes, such as precise conductance control and robust operation. However, their limited ON/OFF ratio has posed challenges in terms of reading accuracy energy efficiency. In addressing this issue, we propose a novel approach involving oxygen plasma irradiation chemical vapor-deposited trilayer memristors. The...

In this paper, a crossbar structure with CMOS based memristor emulator is presented where the spacing between modeled as per circuit's area for real-time design. The interconnect dimension in corresponds to 180 nm technology, and parasitics of are extracted using ANSYS Q3D extractor. parasitic components used design RC circuit model analyze signal delay different states sizes Cadence Virtuoso platform. results architecture provide an insight into how gets affected by state varying load...

This paper presents a novel low-power process, voltage and temperature (PVT)-variation tolerant reference generator that can be easily redesigned across various CMOS technologies. The proposed circuit architecture used in standalone analog integrated circuits may not require nano-scale technologies as well system-on-a-chip applications need much lower technology node due to their dominant digital counterparts. implements weighted averaging of PTAT (proportional absolute temperature) CTAT...

This paper presents a design procedure for practical implementation of current mode instrumentation amplifier (CMIA). The flow highlights the major tradeoffs in CMIA, enabling designer to optimize as per desired critical performance specifications. PSRR analysis implemented CMIA is also presented. target specifications comprise CMRR better than 100 dB without using choppers and trimming, programmable bandwidth, accurate stable gain, rail output swing with pF capacitive load driving...

This paper presents a complete IoT enabled pulse oximeter (PO) system, called OxiSense, made using custom designed low power application specific integrated circuit (ASIC) for signal conditioning. One of the novel aspects developed system is testability all important modules ASIC (both analog and digital) auxiliary circuits implemented in ASIC. Another aspect new embedded efficient processing algorithm which robust to small motion artifacts. has been on low-power micro-controller (embedded...

In this brief we propose a scheme of optimizing the size charge compensation (CC) capacitor in delta-sigma modulator (DSM) using passive (PCC) based switched integrator (SCI). The slewing behavior PCC SCI is analyzed both integration phase (IP) and sampling (SP) to optimize CC capacitor. effectiveness proposed demonstrated by implementing 2–1 cascaded DSM with optimized value 0.18- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">...

A low-power, spur-less ON–OFF keying transmitter (TX) is presented for biosignal communication in medical device radio band (401–406 MHz). TX has been implemented as an optimally designed complementary n-channel metal-oxide–semiconductor and p-channel current reuse <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$LC$ </tex-math></inline-formula> oscillator (LCO) with extremely small size surface mount...

This paper presents an 8 × 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">7</sup> -1 pseudo-random binary sequence (PRBS) generator using Exclusive-OR (XOR) gate merged D flip-flops. In the proposed architecture, to ensure low power, a latch is removed from flip-flop and dynamic logic based XOR along with clock signal used get functionality of master master-slave flip-flop. architecture flip-flop, differential cascode voltage switch (DCVSL)...

In this article, the design and development aspects of a compact bio-potential measuring system, named ExGSense, is presented. Two versions prototype have been developed; first one can measure 3 + 1 V leads in time-multiplexed fashion, while other simultaneously. This article also presents an efficient algorithm for filtering electrocardiogram signals which required to attenuate effect motion artefacts are inevitable wearable systems. Further, user-friendly interface PC smartphone has...

Memristor is a computational and area efficient substitute for resistive synapse in neural networks as it provides tunable non-volatile storage of synaptic weights. Full CMOS circuit realisation 6 × Bidirectional Associative Memory (BAM) network with memristor implemented this paper. To show the BAM network's ability to recall its pattern, we have taken training set three Tetris pattern pairs, corresponding weights are calculated using MATLAB. We integrated proposed emulator crossbar storing...

This work presents a review of advancements made in the areas bio-telemetry and bio-instrumentation for healthcare applications, especially remote health monitoring developing nations. paper comprehensive study suitable wireless, analog RF IC technologies, their challenges limitations, recent researches future directions these areas. As an outcome this study, prototype unit (HMU) has been also proposed by using commercial ICs accordance with recommendations given wireless planning commission...

Two-dimensional graphene has attracted considerable interest as an electrode material for the memristor due to its low-voltage operation and high integration density capability. For emerging graphene-electrode-based memristors, early assessment based on theoretical study becomes increasingly important identify performance benefits guide experimental efforts. However, no accurate physics-based model is available describing bipolar resistive switching mechanism. Therefore, in this work, we...

This work presents a low power injection locked on-off keying (OOK) transmitter (TX) for the Medical Device Radio (MedRadio) communication band (401–406 MHz), which is suitable health care applications. The TX based upon surface acoustic wave resonator (SAWR) oscillator, directly generates stable RF signal at 403.6 MHz and completely removes hungry frequency multiplying circuits from transmitter. Designed fabricated in 180 nm mixed mode CMOS technology, measurement results of SAWR oscillator...