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Published on: February 14, 2014
Design and implementation of a wireless (Bluetooth) four channel bio-instrumentation amplifier and digital data
Alin Cosmanescu1, Benjamin Miller, Terence Magno
1Electr. Eng. Dept., Cooper Union, New York, NY 10003, USA. cosman@cooper.edu
Abstract:
A portable, multi-purpose Bio-instrumentation Amplifier and Data AcQuisition device (BADAQ) capable of measuring and transmitting EMG and EKG signals wirelessly via Bluetooth is designed and implemented. Common topologies for instrumentation amplifiers and filters are used and realized with commercially available, low-voltage, high precision operational amplifiers. An 8-bit PIC microcontroller performs 10-bit analog-to-digital conversion of the amplified and filtered signals and controls a Bluetooth transceiver capable of wirelessly transmitting the data to any Bluetooth enabled device. Electrical isolation between patient/subject, circuitry, and ancillary equipment is achieved by optocoupling components. The design focuses on simplicity, portability, and affordability.
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