A5007083802- Analog and Mixed-Signal Circuit Design
- Neuroscience and Neural Engineering
- Urinary Bladder and Prostate Research
- CCD and CMOS Imaging Sensors
- Energy Harvesting in Wireless Networks
- Low-power high-performance VLSI design
- EEG and Brain-Computer Interfaces
- Spinal Cord Injury Research
- Engineering Technology and Methodologies
- Innovative Energy Harvesting Technologies
- Radio Frequency Integrated Circuit Design
- Tactile and Sensory Interactions
- Advancements in Semiconductor Devices and Circuit Design
- Advanced machining processes and optimization
- Interactive and Immersive Displays
- Wireless Power Transfer Systems
- Mechanical and Optical Resonators
- Advancements in PLL and VCO Technologies
- Manufacturing Process and Optimization
- Advanced Surface Polishing Techniques
- Muscle activation and electromyography studies
- Veterinary Pharmacology and Anesthesia
- Advanced Optical Imaging Technologies
- Advanced Sensor and Energy Harvesting Materials
- Tribology and Lubrication Engineering
University of Bath
2019-2025
Urmia University
2010-2017
Piezoelectric energy harvesters (EH) generate their highest levels at the resonant frequencies of transducer devices. To provide a wide-band EH solution, nonlinear mechanical resonators with multiple modes can be used. We present new asymmetric quad-leg orthoplanar spring (QOPS) microstructure to increase harvesting bandwidth. The proposed design is implemented in CMOS compatible microfabrication processes. Finite element analysis show that designs increases bandwidth by maximum 27% compared...
In this paper a new solution for highly linear, high speed open loop (OL) residue amplifier applications in high-speed pipelined analogue-digital converters is proposed. The proposed has voltage gain of 4 (V/V) with <0.2% non-linearity error and 1.2 Vp-p output swing. compensated process variations by using novel control mechanism, thus maintains the linearity all conditions also presence mismatch. designed 0.35 μm complementary metal-oxide semiconductor process, settling time approximately...
The conversion efficiency of piezoelectric energy harvesters (EH) have been improved by several approaches including frequency up-conversion (FUC) techniques that trigger the high-frequency (HF) resonators using low-frequency (LF) mechanical inputs. This work proposes a new time-domain multiplexing technique to further improve harvesting for random impacts commercially available microfabrication processes. FUC is implemented slowly moving shuttle beam, which represents LF inputs, triggers...
Velocity-selective recording (VSR) of electroneurogram (ENG) signals is a frequently utilized technology in the field neural with applications clinical medicine and neuroprosthetics. VSR classifies excited axon populations terms their conduction velocities using multiple recordings same ENG signal addition channels after introducing controlled time delays. This paper describes first fully integrated analogue realization complete delay-and-add process nine channels. The proposed approach uses...
Managing the urinary bladder is of primary importance to clinicians and patients after trauma spinal cord. Sacral Anterior Root Stimulators that control have been available as clinical technology for many years, however these devices cannot measure fullness or detect onset reflex voiding. In order address this fundamental limitation, it necessary develop a method recording neural signals encode fullness. This paper presents proof concept technique afferents from extradural sacral roots using...
In the development of implantable neural interfaces, recording signals from peripheral nerves is a major challenge. Since interference outside body, other biopotentials, and even random noise can be orders magnitude larger than signals, filter network to attenuate necessary. However, these networks may drastically affect system performance, especially in systems with multiple electrode cuffs (MECs), where higher number electrodes leads complicated circuits. This paper introduces formal...
This study presents a spread spectrum clock generator (SSCG) circuit for high-speed applications. The proposed SSCG adopts phased locked loop with two dual voltage-controlled oscillators and frequency modulation implemented novel control unit to achieve the desired spectrum-spreading profile. consists of an analogue charge pump-based comparator that can determine deviation from reference frequency. Using this simplifies mitigates design constraints, particularly speed requirements unit....
New methods for the analysis of electrically-evoked compound action potentials (eCAPs) are described. Mammalian nerves tend to have broad multi-modal distributions fibre diameters, which translates into a spread conduction velocities. The method velocity selective recording (VSR) is unable distinguish between this spectral and transfer function system. concept impulse (VIF) introduced as tool differentiate these signal system attributes. new enable separate estimates broadening...
Managing the urinary bladder after spinal cord injury is of primary importance because neurogenic dysfunction leads to life-threatening complications. Sacral Anterior Root Stimulators that control have been available for many years, however, these devices cannot sense fullness or detect onset reflex voiding. In order address this fundamental limitation, paper explores possibility recording neural signals encode from sacral roots in sheep using extra-neural books. Stimulation and six (S1, S2...