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Arithmetical logic circuit and operation method thereof

An arithmetic logic and circuit technology, applied in the field of integrated circuit chips, can solve the problems of large circuit area and large area, and achieve the effect of improving the conditions for iterative termination, improving the accuracy, and speeding up the operation speed.

Active Publication Date: 2011-03-30
ACTIONS ZHUHAI TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage is that the calculation speed is fast, and the disadvantage is that the consumed circuit area is larger, even larger than the area of ​​the ROM table, thus limiting the application of this technical solution

Method used

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  • Arithmetical logic circuit and operation method thereof
  • Arithmetical logic circuit and operation method thereof
  • Arithmetical logic circuit and operation method thereof

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Embodiment Construction

[0060] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0061] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0062] The arithmetic logic circuit referred to in each embodiment of the present invention may be an ALU, or a component of the ALU, or a component of a dedicated or general-purpose large chip.

[0063] A first embodiment of the invention relates to an arithmetic logic circuit which is essentially a serial CORDIC. The following first introduces ...

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Abstract

The invention relates to the field of integrated circuit chips, and discloses an arithmetical logic circuit and an operation method thereof. Through the serialization design of a phase operation unit and a condition execution unit, the integrated circuit area of a coordinated rotation digital computer (CORDIC) structure for calculating a sine value and a cosine value is reduced; a serial multiplication and division circuit and a CORDIC circuit are multiplexed, so that the integrated circuit area is further reduced; in addition, the iteration termination condition in the circuit is improved, so that the operation speed is increased.

Description

technical field [0001] The invention relates to the field of integrated circuit chips, in particular to the design of arithmetic logic circuits. Background technique [0002] It has been a long-standing wish of people to hear favorite music anytime and anywhere, and now this wish is realized by the personal music player represented by IPOD. Such a personal music player needs to have various audio encoding and decoding functions, which are usually completed by an integrated circuit chip including an Arithmetic and Logical Unit ("ALU"). [0003] In the encoding and decoding operations of various audio by the ALU, such as Modified Discrete Cosine Transform (MDCT for short), Inverse Modified Discrete Cosine Transform (IMDCT for short), Subband synthesis (subband synthsis), etc., need to use a lot of sine (sine) and cosine (cosine) operations, at the same time need to use a lot of multiplication and a small amount of division operations, the accuracy of these operations is high,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/003G10L19/00G10L19/16
Inventor 彭洪
Owner ACTIONS ZHUHAI TECH CO
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