Abstract: “There are applications that demand the simultaneous acquisition of a very large number of analog signals. This is the case when digital electronics circuits are connected to neural systems at very low level. In this paper, an ADC implemented with only two external resistors and one capacitor is presented. A description of this circuit is provided, including a detailed mathematical analysis of the behavior and its limitations. A circuit design procedure is applied to a real case using discrete components, and it is validated via simulation to demonstrate its performance.”

Keywords: ADC, biological interfaces, FPGA, programmable devices.