Korea Advanced Institute of Science and Technology

Il-Song Han

Dong Ho Cho

Joung Ho Kim

Seung-Young Ahn

Yang Bae Chun

Ji-Yun Ryu

Mi-Joo Kim

Gu Ho Jeong

Eun-Jung Kim

Gyeng-Chul Kim

Hwang-Soo Lee

Young Serk Shim

Jung-Keun Kim

The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.

Power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in resonant frequency

There is provided a direct memory access apparatus and a direct memory access method. The direct memory access apparatus of the present invention comprises: a variable transmission rule map unit for setting a transmission rule with a variable block length and a variable block interval as a unit of memory transmission rule; a direct memory access unit for sending data line of the variable block length and the variable block interval, in case of access to the unit of memory by using the unit of memory transmission rule determined by the variable transmission rule map unit; and an interface unit for retrieving the unit of memory transmission rule, which is necessary for sending the data line of the variable block length and the variable block interval, from the variable transmission rule map unit and sending the unit of memory transmission rule to the direct memory access unit.

Direct memory access apparatus for sending data stored in memory separately from an operation of a main processor and direct memory access method using the same

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Daejeon, South Korea

Il-Song Han