Time-Interleaving Clock Synchronization for Multi-Instance TI Systems
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Solution Overview
Problem
Existing data communication systems face challenges in efficiently designing time-interleaving networks due to nonlinearities, gain/offset mismatches, and timing errors, leading to increased chip area, production cost, and power consumption, which hinders their ability to meet the high demands of modern data transfer requirements.
Innovation Solution
A method and device for synchronizing large-scale time-interleaving systems using a phase detector and multiple time-interleaving devices, where each device includes dividers and a multiplexer, with alignment achieved through comparison of divider output clocks via XOR/XNOR gate phase detection or Time-to-Digital converter, and statistical correlation using autocorrelation of TI device outputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional synchronization methods are used for multi-instance TI systems, then timing alignment can be achieved, but chip area, production cost, and power consumption increase
Solution Approach 1:
The patent merges the synchronization function into the existing TI device architecture by integrating phase detectors and delay elements within the multiplexer structure. This consolidation eliminates the need for separate synchronization circuits, thereby achieving timing alignment without increasing chip area.
Solution Approach 2:
The phase detector and delay elements are designed to serve multiple functions: they are used both for synchronization purposes and for the existing multiplexing operation. This multi-functionality allows the system to achieve timing alignment while reusing existing hardware resources, avoiding additional chip area consumption.
2Manufacturing precision
If conventional synchronization methods are used for multi-instance TI systems, then timing alignment can be achieved, but power consumption increases
Solution Approach 1:
The synchronization function is merged with the existing TI device operation, allowing the phase detection and delay elements to be activated only when needed for synchronization rather than continuously operating as separate circuits. This reduces overall power consumption while maintaining timing alignment capability.
Solution Approach 2:
The system performs self-synchronization by using its own internal signals and structures (existing multiplexer paths and clock signals) to detect and correct phase differences, eliminating the need for external high-power synchronization circuits.
3Manufacturing precision
If conventional synchronization methods are used for multi-instance TI systems, then timing alignment can be achieved, but device complexity increases
Solution Approach 1:
The synchronization functionality is merged into the existing TI device structure, combining phase detection, delay adjustment, and multiplexing operations into a unified architecture. This integration reduces the number of discrete components and simplifies the overall device complexity while achieving timing alignment.
4Productivity
If time interleaving is used to increase data throughput, then bandwidth is improved, but timing errors and mismatches increase
Solution Approach 1:
The phase detector continuously monitors timing differences between parallel channels and provides feedback signals to adjust the delay elements, dynamically compensating for timing errors. This feedback mechanism maintains timing accuracy even as data throughput increases through time interleaving operations.
Solution Approach 2:
The synchronization system is designed to be dynamic, with adjustable delay elements that can be modified in real-time based on detected phase differences. This dynamic adjustment capability allows the system to maintain timing precision across varying data throughput conditions and channel characteristics.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach results in more efficient multi-instance TI systems with improved re-timing margins, scalable architecture, and cost-effectiveness, enabling better alignment and reduced implementation complexity.
Implementation Method 1
the phase detector is configured to determine the phase difference between the divider output clocks of a designated reference TI device and those of the remaining TI devices of the multi-instance TI system
Implementation Method 2
These divider output clocks are sent to a common sense point (e.g., the phase detector, a buffer stage prior to the phase detector, or the like) using multiplexers
Data Source
AI summary
A multi-instance time-interleaving (TI) system and method of operation therefor. The system includes a plurality of TI devices, each with a plurality of clock generation units (CGUs) coupled to an interleaver network. Within each TI device, the plurality of CGUs provides a plurality of clock signals needed by the interleaver network. A phase detector device is coupled to the plurality of TI devices and configured to determine any phase differences between the clock signals of a designated reference TI device and the corresponding clock signals of each other TI device. To determine the phase differences, the phase detector can use a logic comparator configuration, a time-to-digital converter (TDC) configuration, or an auto-correlation configuration. The phases of the clock signals of each other TI device can be aligned to the reference TI device using internal phase control, retimers, delay cells, finite state machines, or the like.