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This work proposes an energy efficient wearable CMOS biomedical signal acquisition and digitization scheme powered by RF energy harvesting circuit. The system consists of a ultra-low power analog front end (AFE) incorporating low noise instrumentation amplifier (IA)(CMRR=75dB), two programmable gain amplifiers (PGA), mixed signal automatic gain control (AGC) and a successive approximation register...
This paper presents an ultra-low power analog front end (AFE) with ΣΔ modulator ADC meant for acquisition of biopotential signals. The system consists of a signal conditioning stage with programmable gain and bandwidth, a mixed signal automatic gain control (AGC), and a ΣΔ ADC. The full system is designed in UMC 18μm CMOS. The AFE achieves an overall linearity of more 10 bits with 0.47μW power consumption...
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