Time-Based Sensor Readout Circuit With Dual-Frequency Pulse- Harmonic Modulation (PHM) Wireless Transmitter

The advancement of mm-scale wireless biosensors is crucial to continuous monitoring of key health metrics that can support more efficient chronic disease monitoring and individ-ualized treatment. CMOS potentiostats are highly advantageous for developing miniaturized, ultra-low power biosensors. In this paper, we proposed the design of a novel wireless CMOS potentiostat that combines a time-based, current input SAR readout with a pulse-harmonic modulation wireless transmitter. The potentiostat readout is designed to accommodate input current in a range between 10 pA and 10μA with a maximum energy consumption of less than 100 p.J/bit.