Debao Zhou
University of Minnesota
USA
Title: Design of a constant-voltage-source to array of sensors to optimize heart-beat detection
Biography
Biography: Debao Zhou
Abstract
This work presents the design of a circuit to capture the signal from the skin-like heart beat sensor and convert it to an electrical signal. The circuit is one part of the optical heart beat detection system which also includes the skin-like optical sensor array and the laser source and data processing unit. The circuit will be connected with the sensor array and be able to detect the sensing signal at each element of the array. The sensor system could also be applied to contact form detection in other biomedical system. The sensing element of the sensor system is realized through the measurement of the change of the resistance. The circuit will power the circuit with a sequence of pulses and the output is distinguishable corresponding to each pulse. The circuit can handle single input and multiple outputs. Testing results showed that the prototype of our circuit built on a breadboard can meet the design criteria with the defect of non-zero offset at the output when the circuit is not powered. Based on the breadboard circuit, the final circuit will be fabricated through CMOS technology on 3mm×3mm silicon chip in order to accommodate the real application of the sensor.