Title :
An 80 mV Startup Dual-Mode Boost Converter by Charge-Pumped Pulse Generator and Threshold Voltage Tuned Oscillator With Hot Carrier Injection
Author :
Chen, Po-Hung ; Zhang, Xin ; Ishida, Koichi ; Okuma, Yasuyuki ; Ryu, Yoshikatsu ; Takamiya, Makoto ; Sakurai, Takayasu
Author_Institution :
Inst. of Ind. Sci., Univ. of Tokyo, Tokyo, Japan
Abstract :
This paper presents an 80 mV startup-voltage dual-mode boost converter for energy harvesting applications. The charge-pumped pulse generator enables a startup operation of the boost converter from the input voltage of 80 mV. The threshold voltage tuned oscillator for the clock generator of the boost converter compensates for the die-to-die process variation by a hot carrier injection (HCI), thereby reducing the minimum operation voltage (VDDMIN) of the clock generator by 45% with a trimming time of 10 minutes. The proposed step-up converter achieves the lowest startup voltage without using a mechanical switch or a large transformer.
Keywords :
CMOS analogue integrated circuits; charge pump circuits; energy harvesting; hot carriers; oscillators; power convertors; pulse generators; CMOS; HCI; charge-pumped pulse generator; clock generator; die-to-die process variation; energy harvesting applications; hot carrier injection; large transformer; mechanical switch; size 65 nm; startup dual-mode boost converter; step-up converter; threshold voltage tuned oscillator; time 10 min; voltage 80 mV; Charge pumps; Clocks; Human computer interaction; Oscillators; Power transistors; Pulse generation; Transistors; ${rm V}_{rm TH}$ -tuned oscillator; Charge-pumped pulse generator; dual-mode boost converter; energy harvesting; hot carrier injection; low voltage; startup;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2012.2210953
