Dual glucose/cholesterol meter applications based on FPGA platform

In this paper, a dual glucose/cholesterol meter application based on FPGA platform is introduced. It consists of a dual glucose/cholesterol readout circuit, an analog to digital converter (ADC), a digital controller, a serial Electrically Erasable Programmable Read-Only Memory (EEPROM), and a Liquid Crystal Display (LCD). The readout circuit is used to proportionally transfer the current signal detected by a glucose/cholesterol sensor. It was fabricated by 0.35 μm TSMC CMOS process with an area of 0.086 mm² and 409.29μW power consumption. The ADC is added to transfer the output signal of the readout chip in analog format to the input signal of the micro controller in the digital format. The digital controller is simulated by using a Field Programmable Gate Array (FPGA) as a platform, which displays the measured result on LCD and stores the detected data into the serial EEPROM. The linearity of this work is 0.9850 for the current sensing range of 5.01~22.3 μA within glucose concentration range of 50~400 mg/dL with the power consumption of this system is 46.893 mW and current sensing range of 500~600 μA within cholesterol concentration range of 150~300 mg/dL. In addition, this system can produce the glucose concentration (mg/dL) results within 11 seconds which is faster than current products and previous works [1], [2] and the cholesterol concentration (mg/dL) results within 20 seconds. Compared to previous systems, the experiment results show that this work has a better performance in terms of linearity, accuracy and power consumption.