Energy monitoring system for security and power management applications

In this paper, we introduce an energy monitoring system composed of a mixed-signal field-programmable gate array (FPGA) device and a custom designed energy measurement circuit. The energy measurement circuit is designed as a current integrator over a fixed interval using the switched-capacitor (SC) technique. The circuit is implemented using the 65 nm CMOS technology. Simulation results show that our circuit provides energy measurement results with a precision of up to 3% for irregular input waveforms. The circuit is designed to accommodate the low sampling rate of mixed-signal FPGA devices in order to support both power management and security applications for embedded devices.