Design method and device for standard cell library

Abstract

The invention discloses a design method and a device for a stand cell library. The design method comprises the following steps: a cell height is acquired, i.e. the cell height is acquired according to the size of a single-drive inverter cell and the series connection proportion of transistors; and the cell height is integral multiple of the horizontal wiring space and is larger than or equal to the sum of a first numerical value, a second numerical value and a third numerical value, wherein the first numerical value is the product of the channel width of the N-transistors of the single-drive inverter cell and the series connection proportion of the N-transistors with the maximum series connection series; the second numerical value is the product of the channel width of the P-transistors of the single-drive inverter cell and the series connection proportion of the P-transistors with the maximum series connection series; and the third numerical value is the total length regulated in a design rule. By adopting the invention, the phenomena that the cell size is not matched with a layout structure is greatly decreased; the layout area is reduced; and the design efficiency of the layoutis increased.

Description

technical field [0001] The invention relates to the field of application-specific integrated circuit design, in particular to a design method and device for a standard cell library. Background technique [0002] The standard cell method is a semi-custom design method for ASIC (Application Specific Integrated Circuit) based on the standard cell library. This method first integrates some basic logic units (such as gate circuits, multi-way switches, flip-flops, etc.) in the circuit design. ), designed according to the principle of optimal design, and stored in the standard cell library as a standard cell. When designing an ASIC, call the required standard cell from the standard cell library according to the circuit requirements, and perform automatic logic synthesis and automatic layout. Wiring, complete the circuit design. [0003] Establishing a suitable standard cell library is a very important step in the standard cell method. The current standard cell library is mainly b...

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Problems solved by technology

[0033] In view of this, the purpose of the embodiments of the present invention is to provide a method and device for designing a standard cell library to solve the waste of layout area caused by the mismatch between the size of the standard cell and the layout structure in the layout design of the standard cell library and the layout design. The problem of reduced efficiency

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