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Fixed polarity conversion method for design of digital circuit

A fixed polarity conversion, digital circuit technology, applied in the direction of electrical digital data processing, calculation, special data processing applications, etc., can solve problems such as not considering irrelevant items

Active Publication Date: 2013-03-20
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above two polarity conversion methods do not consider the irrelevant items that may exist in the SOP expansion

Method used

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  • Fixed polarity conversion method for design of digital circuit
  • Fixed polarity conversion method for design of digital circuit
  • Fixed polarity conversion method for design of digital circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] Embodiment: a kind of fixed polarity conversion method that is used for digital circuit design, at first read in the SOP expansion formula of the Boolean logic function that contains irrelevant item; Then utilize fast list technique to set up minimum item index table and irrelevant item index table respectively; Finally Search for the optimal trade-off of irrelevant items, select appropriate irrelevant items and write them into the FPRM function formula, and obtain the FPRM expansion with the least number of items; the specific process is as follows:

[0034] ① Read in the Boolean circuit, and express the Boolean circuit with the SOP expansion of the Boolean logic function including irrelevant items as: f ( x n - 1 , x n - 2 , ...

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Abstract

The invention discloses a fixed polarity conversion method for design of a digital circuit. The method comprises the following steps of: firstly reading in an SOP (Sum-of-Products) expansion of a Boolean logic function containing irrelative items; respectively establishing a minterm index table and an irrelative item index table by utilizing a quick list technology; and finally, searching the optimal irrelative item for choice, selecting an appropriate irrelative item to be read in an FPRM (Fixed Polarity Reed Muller) functional expression to obtain an FPRM expansion with lest and items. The method has the advantages that the conversion of fixed polarity from the SOP expansion of the Boolean logic function containing the irrelative items to an RM expansion in the design process of the digital circuit is realized; through the test of ten 10 MCNC (microelectronics center of north carolina) Benchmark circuits, the result shows that: compared with the fixed polarity conversion method which does not consider the irrelative items, the method has the advantages that the FPRM expansion can be effectively simplified, and the RM logic circuit with smaller area, lower power consumption and faster speed is obtained.

Description

technical field [0001] The invention relates to the technical field of digital circuit design, in particular to a fixed polarity conversion method for digital circuit design. The method is mainly aimed at RM logic functions containing irrelevant items. Background technique [0002] Digital circuits are generally implemented with Boolean (Boolean) logic that forms a complete set of AND / OR / NOT (and / or / not). However, some circuits, such as arithmetic circuits, communication circuits, and parity check circuits, have significant advantages in terms of area, power consumption, and speed when implemented with RM (Reed-Muller) logic. In addition, digital circuits implemented with RM logic also exhibit better testability. RM logic is mainly composed of XNOR / OR (same or / or) or XOR / AND (exclusive or / and) operations, and FPRM (fixed polarity Reed Muller) expansion is an important RM logic expansion. [0003] The FPRM expansion can be obtained from the Boolean logic SOP (Sum-of-Product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 汪鹏君汪迪生蒋志迪孙飞
Owner NINGBO UNIV
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