Towards a Miniature Implantable In Vivo Telemetry Monitoring System Dynamically Configurable as a Potentiostat or Galvanostat for Two- and Three-Electrode Biosensors

Beach, R.D.; Conlan, R.W.; Godwin, M.C.; Moussy, Francis

doi:10.1109/tim.2004.839757

Cited by 104 publications

(59 citation statements)

References 16 publications

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“…The data will be recorded into memory for each frequency within the range specified by the user. The processor then reads the stored raw data in the memory and calculates the values of ZxR and ZxI using equations (1)- (4). Once the computation is complete, the processing unit then writes the processed data to memory.…”

Section: System Overviewmentioning

confidence: 99%

“…The processor module calculates the real and imaginary values of Zx as shown in Equation (3) and Equation (4). The processor also has to convert the real and imaginary values of Zx into its polar form to obtain the phase shifts between the input and output signals.…”

Section: Processor Modulementioning

confidence: 99%

“…It then uses the sine/cosine lookup table to turn |Vf| and Vf(θ) into VfR and VfI. These two values are then used to find the denominator of Equation (3) and Equation (4). Meanwhile, the initial data from the user allow the processor to find the nominators for Equation (3) and Equation (4).…”

Section: Processor Modulementioning

confidence: 99%

“…These two values are then used to find the denominator of Equation (3) and Equation (4). Meanwhile, the initial data from the user allow the processor to find the nominators for Equation (3) and Equation (4). The denominator and the nominator are represented by L and M in Figure 10 respectively.…”

Section: Processor Modulementioning

confidence: 99%

“…By definition, bioimpedance can be described as the ability of biological tissues to restrict electrical current [1][2][3]. At cellular levels, studying impedance properties of cells allow detection of various substances such as chemical toxins, bacteria, viruses, due to the presence of the many types of receptors on cell membranes [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

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Reconfigurable, Multi-channel and Modular Bioimpedance Spectroscopy System on Field Programmable Gate Arrays

Nordin¹,

Al-Hashimi²,

Azman³

2017

Preprint

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This paper presents the design and implementation of a multichannel bio-impedance spectroscopy system on field programmable gate arrays (FPGA). The proposed system is capable of acquiring multiple signals from multiple bio-impedance sensors, process the data on the FPGA and store the final data in the on-board Memory. The system employs the Digital Automatic Balance Bridge (DABB) method to acquire data from biosensors. The DABB measures initial data of a known impedance to extrapolate the value of the impedance for the device under test. This method offers a simpler design because the balancing of the circuit is done digitally in the FPGA rather than using an external circuit. Calculations of the impedance values for the device under test were done in the processor. The final data is sent to an onboard Flash Memory to be stored for later access. The control unit handles the interfacing and the scheduling between these different modules (Processor, Flash Memory) as well as interfacing to multiple Balance Bridge and multiple biosensors. The system has been simulated successfully and has comparable performance to other FPGA based solutions. The system has a robust design that is capable of handling and interfacing input from multiple biosensors. Data processing and storage is also performed with minimal resources on the FPGA.

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Section: System Overviewmentioning

confidence: 99%

Section: Processor Modulementioning

confidence: 99%