Configurable logic element based on NAND OR structure

A programming logic and non-structural technology, which is applied in the field of programmable logic units based on AND or non-structure, can solve the problems of inconvenient application circuit timing constraints, and achieve the effects of fast adjustment speed, small delay difference, and small area

Active Publication Date: 2016-05-25
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two configurations have different delay performance on the delay path, which brings inconvenience to the application circuit to realize the later timing constraints

Method used

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  • Configurable logic element based on NAND OR structure
  • Configurable logic element based on NAND OR structure
  • Configurable logic element based on NAND OR structure

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0023] The present invention proposes a programmable logic unit based on NANDOR (NANDOR) structure, which is used to replace image 3 The AIC base unit module BAE of 300 is shown. The basic working principle of BAE is that it can control the storage value of the SRAM unit through programming to realize the logic function of "AND" or "AND". figure 2 The shown architecture is multi-level connected, that is, complex logic functions can be realized. According to Demogan's theorem, any function can be rewritten into a combined expression of AND and NOT units through logical operations, so the function can be realized through the AIC structure.

[0024] The programmable NANDOR unit (NANDOR) proposed by the present invention ...

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Abstract

The invention discloses a configurable logic element based on an NAND OR structure. The unit comprises an NAND OR basic element; the NAND OR basic element realizes NAND or NOR function of first input data and second input data under the control of the output control signals of an SRAM storage element; the NAND OR basic element comprises a pull-up network pFET logic circuit module and a pull-down network nFET logic circuit module; the pull-up network pFET logic circuit module comprises at least one first to at least one fifth pFET transistors; and the pull-down network nFET logic circuit module comprises at least one first to at least one fifth nFET transistors. According to the configurable logic element disclosed by the invention, the configurable NAND OR is taken as the basic logic cone element; the number of the demanded transistors is less than that of an And-Inverter Cone structure; the area is smaller; the circuit series to be passed by the signals are few; the speed is good; the delay difference is little; and the delay for realizing different functions is approximately the same through adjusting the parameters of the transistors.

Description

technical field [0001] The invention belongs to the technical field of computer programmable logic, in particular to a programmable logic unit based on an NANDOR structure. Background technique [0002] Since the development of programmable logic devices, it has become an indispensable medium for the realization of digital circuits. The flexible programmability of programmable devices makes it configurable to implement different logic functions to meet the functional requirements of different users. With the advancement of manufacturing technology, the performance of programmable logic devices has been continuously improved. In addition, programmable logic devices also have a shorter product development time. The above advantages make programmable logic devices widely used in different application fields. [0003] A programmable logic device is mainly composed of a programmable logic block (ConfigurableLogicBlock, CLB) and a programmable interconnection module. The CLB i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/20
CPCH03K19/20
Inventor 黄志洪韦援丰杨立群李威魏星江政泓林郁杨海钢
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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