公开(公告)号：US20080219047A1

公开(公告)日：2008-09-11

申请号：US12040137

申请日：2008-02-29

申请人： Byoung-Gon YU ,  Byung-Do Yang ,  Seung-Yun Lee ,  Sung-Min Yoon ,  Young Sam Park ,  Nam Yeal Lee

发明人： Byoung-Gon YU ,  Byung-Do Yang ,  Seung-Yun Lee ,  Sung-Min Yoon ,  Young Sam Park ,  Nam Yeal Lee

IPC分类号： G11C7/00 ,  G11C11/21

CPC分类号： G11C7/1006 ,  G11C13/0004 ,  G11C13/0038 ,  G11C13/0069 ,  G11C2013/0076 ,  G11C2211/5647

摘要： Provided are an apparatus and method for writing data to a phase-change random access memory (PRAM) by using writing power calculation and data inversion functions, and more particularly, an apparatus and method for writing data which can minimize power consumption by calculating the power consumed while input original data or inverted data is written to a PRAM and storing the data consuming less power. A PRAM consumes a significant amount of power in order to store data in a memory cell since a large electric current is required to flow for a long period of time. According to the present invention, since the PRAM consumes different amounts of power when writing data with a value of 0 and data with a value of 1, the power consumed when input original data is stored and the power consumed when the input original data is inverted and stored are compared to each other, the data with a smaller power consumption is stored when the data is written to the PRAM as a word unit, and thus the power consumption of the PRAM can be reduced.

摘要翻译： 提供了一种通过使用写入功率计算和数据反转功能将数据写入相变随机存取存储器（PRAM）的装置和方法，更具体地，涉及一种用于写入数据的装置和方法，该装置和方法可通过计算功率来最小化功耗 在输入原始数据或反相数据被写入PRAM并存储消耗较少功率的数据时消耗。 由于需要大电流长时间流动，所以PRAM消耗大量的功率以便将数据存储在存储单元中。 根据本发明，由于在写入值为0的数据和值为1的数据时，PRAM消耗不同的功率量，所以当输入原始数据被存储时消耗的功率和当输入的原始数据被反相时消耗的功率 并将其进行存储，将数据作为字单元写入PRAM时，存储具有较小功耗的数据，从而能够降低PRAM的功耗。

公开(公告)号：US07920413B2

公开(公告)日：2011-04-05

申请号：US12040137

申请日：2008-02-29

申请人： Byoung-Gon Yu ,  Byung-Do Yang ,  Seung-Yun Lee ,  Sung-Min Yoon ,  Young Sam Park ,  Nam Yeal Lee

发明人： Byoung-Gon Yu ,  Byung-Do Yang ,  Seung-Yun Lee ,  Sung-Min Yoon ,  Young Sam Park ,  Nam Yeal Lee

IPC分类号： G11C11/00

CPC分类号： G11C7/1006 ,  G11C13/0004 ,  G11C13/0038 ,  G11C13/0069 ,  G11C2013/0076 ,  G11C2211/5647

摘要： Provided are an apparatus and method for writing data to a phase-change random access memory (PRAM) by using writing power calculation and data inversion functions, and more particularly, an apparatus and method for writing data which can minimize power consumption by calculating the power consumed while input original data or inverted data is written to a PRAM and storing the data consuming less power. A PRAM consumes a significant amount of power in order to store data in a memory cell since a large electric current is required to flow for a long period of time. According to the present invention, since the PRAM consumes different amounts of power when writing data with a value of 0 and data with a value of 1, the power consumed when input original data is stored and the power consumed when the input original data is inverted and stored are compared to each other, the data with a smaller power consumption is stored when the data is written to the PRAM as a word unit, and thus the power consumption of the PRAM can be reduced.

摘要翻译： 提供了一种通过使用写入功率计算和数据反转功能将数据写入相变随机存取存储器（PRAM）的装置和方法，更具体地，涉及一种用于写入数据的装置和方法，该装置和方法可通过计算功率来最小化功耗 在输入原始数据或反相数据被写入PRAM并存储消耗较少功率的数据时消耗。 由于需要大电流长时间流动，所以PRAM消耗大量的功率以便将数据存储在存储单元中。 根据本发明，由于在写入值为0的数据和值为1的数据时，PRAM消耗不同的功率量，所以当输入原始数据被存储时消耗的功率和当输入的原始数据被反相时消耗的功率 并将其进行存储，将数据作为字单元写入PRAM时，存储具有较小功耗的数据，从而能够降低PRAM的功耗。

公开(公告)号：US06615398B2

公开(公告)日：2003-09-02

申请号：US10017315

申请日：2001-12-18

申请人： Hyun Kyu Yu ,  Seon-Ho Han ,  Mun Yang Park ,  Seong-Do Kim ,  Yong-Sik Youn ,  Lee-Sup Kim ,  Ki-Hyuk Sung ,  Byung-Do Yang ,  Young-Jun Kim

发明人： Hyun Kyu Yu ,  Seon-Ho Han ,  Mun Yang Park ,  Seong-Do Kim ,  Yong-Sik Youn ,  Lee-Sup Kim ,  Ki-Hyuk Sung ,  Byung-Do Yang ,  Young-Jun Kim

IPC分类号： G06F1750

CPC分类号： G06F1/0356 ,  G06F1/0328 ,  G06F2101/04 ,  G11C17/00

摘要： The present invention relates to a ROM division method for reducing the size of a ROM in a direct digital frequency synthesizer (DDFS), which is used to synthesize a frequency in a communication system requiring fast frequency conversion. A ROM consuming most energy in the system, a modified Nicholas architecture is brought forth to reduce the size of ROM. In this modified Nicholas architecture, a ROM is divided into coarse ROM and fine ROM to convert phase to sine value. The present invention divides the coarse ROM and the fine ROM into quantized ROM and error ROM respectively. Then, value stored in each ROM is segmented in certain intervals and the minimum quantized value in each of the section is stored in the quantized ROM, while the difference between the original ROM value and the quantized ROM value is stored in the error ROM. This way, the size of a ROM can be reduced. Phase value inputted in a DDFS, a sine value is calculated by adding the four ROM values, i.e., coarse-quantized ROM, coarse-error ROM, fine-quantized ROM and fine-error ROM.