Flip-Flop Standard Cell With Integrated Bit Write and Hold
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Solution Overview
Problem
Existing integrated circuit design processes, particularly in electronic design automation (EDA), face inefficiencies in memory array construction due to the need for additional circuitry for bit write and hold functions in flip flop standard cells, leading to increased power usage and space requirements.
Innovation Solution
The integration of bit write and hold functions within the flip flop standard cell itself, along with shared clock and scan enable signals across arrays, reduces the need for external circuitry and enhances cell utilization, resulting in more efficient memory array design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional external circuitry is used for bit write and hold functions in flip flop standard cells, then the flip flop can perform required functions, but power consumption increases and cell area increases
Solution Approach 1:
The patent merges the bit write and hold functions directly into the flip flop standard cell by integrating share write and hold transistors within the cell structure. This consolidation eliminates the need for separate external circuitry, thereby reducing power consumption while maintaining complete flip flop functionality.
Solution Approach 2:
The flip flop standard cell is designed with multi-functional transistors that can operate in different modes (write mode and hold mode) based on control signals. This universality allows a single integrated structure to perform multiple functions that would traditionally require separate dedicated circuitry, reducing overall power usage.
2Reliability
If additional external circuitry is used for bit write and hold functions in flip flop standard cells, then the flip flop can perform required functions, but cell area increases
Solution Approach 1:
The patent combines the bit write and hold functions within the flip flop standard cell by integrating share write and hold transistors into the cell structure. This merging eliminates the need for separate external circuitry, thereby reducing cell area while maintaining complete flip flop functionality.
Solution Approach 2:
The patent implements a nested structure where the bit write and hold functions are embedded within the flip flop standard cell boundaries. The share write and hold transistors are positioned inside the cell area, creating a compact nested arrangement that reduces overall cell footprint while preserving all required functions.
3Reliability
If additional external circuitry is used for bit write and hold functions, then the flip flop can perform required functions, but memory array packing density decreases
Solution Approach 1:
The patent merges the bit write and hold functions directly into the flip flop standard cell, eliminating external circuitry requirements. This consolidation reduces the space occupied by each flip flop unit, thereby increasing memory array packing density and allowing more flip flops to be packed into the same area.
Solution Approach 2:
By designing universal transistors that can perform both write and hold functions within the standard cell, the patent reduces the overall circuit footprint. This multi-functionality enables higher packing density in memory arrays while maintaining complete flip flop operational capabilities.
Data Source
AI summary
A flip flop standard cell that includes a data input terminal configured to receive a data signal, clock input terminal configured to receive a clock signal, a data output terminal, and a latch. A bit write circuit is configured to receive a bit write signal. The received data signal is latched and provided at the output terminal in response to the bit write signal and the clock signal. A hold circuit is configured to receive a hold signal, and the received data signal is not latched and provided at the data output terminal in response to the hold signal and the clock signal.