Fig. 5
From: The open-source multi-wavelength non-invasive blood glucose sensing system
Signal acquisition block for glucose measurement: (a) schematic of LED control and (b) transimpedance amplifier, low-pass filter, multiplexer, and differential amplification circuits. Figures (a) and (b) were created using EasyEDA (Standard) version 6.5.46 (https://easyeda.com).
