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Autonomous di/dt Control of Power Supply for Margin Aware Operation Toru NAKURA Makoto IKEDA Kunihiro ASADA Publication IEICE TRANSACTIONS on Electronics Vol.E89-C No.11 pp.1689-1694 Publication Date: 2006/11/01 Online ISSN: 1745-1353 DOI: 10.1093/ietele/e89-c.11.1689 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Electronic Circuits Keyword: autonomous di/dt control, margin aware, di/dt detector, power supply current, Full Text: PDF(840.6KB)>>
Summary: This paper demonstrates an autonomous di/dt control of power supply for margin aware operation. A di/dt on the power line is detected by a mutual inductor, the induced voltage is multiplied by Gilbert multiplier and the following low pass filter outputs a DC voltage in proportion to the di/dt. The DC voltage is compared with reference voltages, and the modes of the internal circuit is controlled depending on the comparators output. By using this scheme, the di/dt noise power can be autonomously controlled to fall within a defined range set by the reference voltages. Our experimental results show that the internal circuit oscillates between the all-active and the half-active modes, also show that the all/half ratio and the oscillation frequency changes depending on the reference voltages. It proves that our autonomous di/dt noise control scheme works as being designed. | |||||
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