Masakatsu Nakai

TL;DR: In this article, a dynamic voltage and frequency management (DVFM) scheme was introduced in a microprocessor for handheld devices with wideband embedded DRAM, which reduces the power consumption effectively by cooperation of the autonomous clock frequency control and the adaptive supply voltage control.

TL;DR: A dynamic voltage and frequency management (DVFM) scheme with leakage power compensation effect is introduced in a microprocessor with 128-bit wideband 64-Mb embedded DRAM, achieving 82% power reduction in personal information management scheduler application and 40% power reduced in MPEG4 movie playback.

TL;DR: In this paper, the authors proposed a delay-difference-detecting circuit for detecting a phase difference between the delayed pulse signal and the detection pulse signal, and a control circuit for adjusting the magnitude of a power-supply voltage VDD supplied to the target circuit according to the phase difference detected by the delay difference detector.

TL;DR: In this paper, a delay signal generation circuit for switching the configuration of delay element arrays based on first configuration information and second configuration information was proposed, and a control circuit for controlling a power source voltage based on the delay information of a delay element array and outputting to the selector a selection signal to select from the first configuration information in a time sharing way.

TL;DR: In this paper, a semiconductor device with a power cutoff transistor and a first conductivity type was described. Butts of the first and second conductivity types formed to be spaced from each other in the semiconductor substrate.