Cascaded Retiming Divider for Time-Synchronized High-Speed Outputs
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Solution Overview
Problem
Current synchronous divider circuits face limitations in achieving high-speed operations with time-synchronized outputs, as existing technologies often result in asynchronous counters with delayed signal availability, which restricts their application in high-speed communication and quantum computing environments.
Innovation Solution
A synchronous divider circuit design incorporating multiple stages of D-flip-flop and retiming flip-flop circuits, where the output of one retiming flip-flop is connected to the input of the next stage's D-flip-flop, ensuring time-synchronized outputs and compensating for internal delays, allowing for high-frequency operations independent of division ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional asynchronous counter designs are used, then device complexity is reduced, but output signal synchronization is lost and signal availability is delayed
Solution Approach 1:
The counter is divided into multiple independent stages, each with its own retiming flip-flop circuit. This segmentation allows each stage to be optimized for synchronization while maintaining overall system functionality, resolving the contradiction between synchronization reliability and structural complexity.
Solution Approach 2:
Retiming flip-flop circuits are introduced as intermediary elements between the main counter stages and output terminals. These intermediaries buffer and resynchronize signals, ensuring time-synchronized outputs without requiring complete redesign of the counter structure.
2Reliability
If retiming flip-flop circuits are added for synchronization, then output signal synchronization is achieved, but input clock load increases
Solution Approach 1:
Retiming flip-flop circuits are selectively applied only to stages where synchronization is critical, rather than uniformly to all stages. This localized approach achieves time-synchronized outputs while minimizing the overall increase in input clock load and energy consumption.
3Adaptability or versatility
If more divider stages are added for higher division ratios, then frequency division capability is improved, but output synchronization becomes more difficult to maintain
Solution Approach 1:
The retiming flip-flop circuit is designed as a universal module that can be applied to any divider stage regardless of the division ratio. This modular universal design allows the counter to handle any number of bits or frequency division ratios while maintaining time-synchronized outputs through consistent application of the same synchronization principle.
Data Source
AI summary
A synchronous divider circuit with time-synchronized outputs. The synchronous divider circuit includes a plurality of divider stages including each a D-flip-flop circuit and a respective retiming flip-flop circuit, wherein an output terminal of the retiming flip-flop circuit of a current divider stage is connected to an input of the D-flip-flop circuit of a next divider stage, and wherein the current divider stage includes an additional retiming flip-flop circuit, wherein the output terminal of the retiming flip-flop circuit of the current divider stage is connected to an input terminal of the additional retiming flip-flop circuit of the current divider stage, so that an output signal of the additional retiming flip-flop circuit of the current divider stage and an output terminal of the retiming flip-flop circuit of the next divider stage are time-synchronized with respect to each other.