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1. 发明授权

US06615398B2 Method for dividing ROM and DDFS using the same method 有权
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.

2. 发明申请

US20080219047A1 APPARATUS AND METHOD FOR WRITING DATA TO PHASE-CHANGE MEMORY BY USING POWER CALCULATION AND DATA INVERSION 有权
标题翻译：通过使用功率计算和数据反相将数据写入相变记忆的装置和方法
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。

3. 发明授权

US07920413B2 Apparatus and method for writing data to phase-change memory by using power calculation and data inversion 有权
标题翻译：通过使用功率计算和数据反演将数据写入相变存储器的装置和方法
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。

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