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A Mixed Number System Adder

An adder and mixed number technology, which is applied in the calculation using the number system and the calculation using non-contact manufacturing equipment to achieve the effect of avoiding software number system conversion, low power consumption, and simple unit structure

Inactive Publication Date: 2012-02-15
BEIJING MXTRONICS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the design of special function arithmetic units has always been the core technology of foreign blockades, and there are few clear and detailed reports on the implementation methods and structures in the published literature.

Method used

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  • A Mixed Number System Adder
  • A Mixed Number System Adder
  • A Mixed Number System Adder

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Experimental program
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Effect test

Embodiment Construction

[0029] In order to understand the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] Such as figure 1 As shown, the mixed number system adder is mainly composed of a mixed adder unit, and realizes a mixed adder of n (n=4i, wherein i=1, 2, 3, 4, 5...) bits, It needs to be composed of n / 4 mixed adder units, and the carry method adopts the wave carry from low to high, that is, the output of the digital carry synthesizer of the low-order mixed adder unit is connected to the 4-bit addition of the adjacent high-order mixed adder unit The carry input terminal in the register. A mixed adder unit can realize the addition operation of a group of 4-bit binary numbers and the operation of decimal numbers represented by a group of 4-bit BCD codes. A hybrid adder unit consists of an input data strobe, an operand a data latch controller, an operand b data latch controller, a 4-bit adder, a ...

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Abstract

A mixed number system adder is mainly composed of a plurality of four-bit mixed adder units, each mixed adder unit includes an input data strobe, an operand a data latch controller, an operand b data latch A controller, a four-bit adder, a number system carry synthesizer, a value overflow judger, a number system normalizer and a mixed number system four-bit operation result selector. The present invention can realize single-shot binary operation and three-shot BCD code representation of decimal number operation, adopt hardware method to realize operation of different number systems, avoid software number system conversion, and improve operation efficiency of mixed number system. The number of digits calculated by the digital adder can be flexibly expanded according to the calculation requirements. The adder has a simple structure, small area, low power consumption, is easy to implement on a chip, and has strong practicability.

Description

technical field [0001] The present invention relates to a mixed number system adder, in particular to a method for realizing a mixed number system adder and a specific hardware structure, which can be used in the design and manufacture of embedded processors, controllers and arithmetic units in special SOCs . Background technique [0002] Mixed number calculations are widely used. For example, in many electronic products such as prepaid electronic electricity meters, electronic water meters, electronic medical equipment CT, and electronic sphygmomanometers, there are problems with mixed number calculations and conversions. The operations are mainly binary operations. The traditional method is to complete it through software, which is inefficient and not conducive to the development and maintenance of embedded application systems. Today, with the rapid development of processors, controllers, and dedicated SoCs, driven by the market demand for embedded system application deve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F7/50
Inventor 车德亮张奇荣
Owner BEIJING MXTRONICS CORP