Dual-power standard cell, dual-power standard cell library and integrated circuit design method

Abstract

The invention provides a dual-power standard cell, a dual-power standard cell library and an integrated circuit design method. The dual-power standard cell is provided with a conventional power line and a low-voltage power line; the conventional power line and the low-voltage power line are configured to alternatively provide power voltage for the dual-power standard cell; after the conventional power line and the low-voltage power line are respectively selected, conventional power supply voltage and low-voltage power supply voltage can be correspondingly provided for the dual-power standard cell; during integrated circuit design, a dual-power standard cell connected with conventional power voltage on a non-critical path of an integrated circuit can be replaced with a dual-power standard cell connected with low-voltage power voltage according to needs; therefore, the non-critical path is optimized, and the time delay of the non-critical path is still faster than that of the critical path, so that the purpose of reducing switching power consumption and electric leakage power consumption is achieved, and an additional mask plate is not added to a manufacturing process corresponding to an integrated circuit due to layout change of a cell region.

Description

technical field [0001] The invention relates to the technical field of integrated circuit design, in particular to a double power supply standard unit, a double power supply standard unit library and an integrated circuit design method. Background technique [0002] Digital integrated circuits can be designed based on standard cells in a digital standard cell library. Specifically, the standard cell library contains basic logic units and some functional units required in digital integrated circuit design, such as basic gate circuits, multi-way switches, flip-flops, full adders, encoders, etc. Standard cells have become very ubiquitous and are used to implement nearly all logic elements in today's integrated circuits. Due to the improvement of the quality of automatic cell placement and routing tools realized by multi-layer wiring layers and the emergence of mature logic synthesis tools, the design method based on standard cells can greatly reduce the cost and cycle of digit...

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Problems solved by technology

[0003] However, when HVT standard cells are used to replace standard cells on non-critical paths, the following unavoidable defects still exist: (1) Due to the different cell layouts of HVT standard cells and SVT / RVT / LVT standard cells, the HVT standard cells The corresponding manufacturing process is different from the manufacturing process corresponding to the SVT / RVT / LVT standard cell, so this replacement usually adds an additional mask to the manufacturing process corresponding to the digital integrated circuit, thereby increasing the manufacturing cost; (2 ) Difficult to reduce switching power dissipation

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