Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
1998-11-10
2001-05-08
Pan, Daniel H. (Department: 2171)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
C708S319000, C708S166000, C708S409000, C700S004000
Reexamination Certificate
active
06230175
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a digit-serial arithmetic system.
U.S. Pat. No. 5,016,011 shows a digit-serial arithmetic system in which a data word is partitioned into a plurality of, for example, 4-bit digits. This type of digit-serial arithmetic system has the capability to provide high throughput performance by making use of the advantages of both the word-parallel architecture and the bit-serial architecture.
In digital signal processors (DSPs), it is necessary to carry out operations on various types of words having different numbers of bits. Therefore, in order to realize a digit-serial DSP, it is necessary to make a change in the configuration of the digit-serial DSP according to a change in the number of digits forming a data word. However, the above-described digit-serial arithmetic system is unable to make a change in its configuration with flexibility.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a reconfigurable digit-serial arithmetic system.
In order to achieve the object, the present invention provides a digit-serial arithmetic system having a plurality of digit-serial arithmetic units, in which according to the arithmetic result, the indications of the positions of digits are reset for each digit-serial arithmetic unit for maintaining the concept of the digits. In addition, a network of digit-serial arithmetic units provides programmability.
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Kadota Hiroshi
Mino Yoshiteru
Okamoto Tadashi
Chen Te(Susan)
Matsushita Electric - Industrial Co., Ltd.
Nixon & Peabody LLP
Pan Daniel H.
Robinson Eric J.
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