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A low-input-voltage, highly efficient single-inductor-dual-output (SIDO) boost converter fabricated in 0.18 μm CMOS process is presented for thermoelectric energy harvesting. Two key technologies are implemented to accept input voltage down to 20 mV and to achieve 69 % conversion efficiency at 100 mV, which is the highest conversion efficiency reported to date for such a device. The first key is a...
This paper presents an ADC with programmability between SAR-only mode and delta-sigma (ΔΣ) assisted mode. The ΔΣ assisted mode brings 1st order noise shaping for resolution enhancement. Proposed charge shuttling technique makes it possible to share a charge re-distribution capacitor array for DAC in SAR, feedback DAC, and integrator capacitor in ΔΣ loop and improve the accuracy. The prototype ADC...
A 2nd order discrete time (DT) ΔΣ modulator with very wide supply voltage range of 0.25–1.8 V is presented. An inverter-opamp self-configuring amplifier (IOSA) is proposed with sufficient gain through sub-threshold to strong inversion region. The amplifier senses the supply voltage and automatically configures either to operate as an inverter or an opamp. The prototype ADC fabricated in 180nm CMOS...
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