Signal Path Inversion for Clock Width Preservation in ICs
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Solution Overview
Problem
High-speed data transfer in semiconductor devices is hindered by signal distortion caused by large metal and gate loading, which affects the quality of signals such as clock signals along signal paths.
Innovation Solution
Inverting signals multiple times along signal paths using a series of inverting units, including logic inverters, XNOR, XOR logic with an inverting control signal, or buffering circuits with an odd number of logic inverters, to compensate for differences between rising and falling delay times, thereby maintaining signal width and reducing distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If signals are transmitted along signal paths in semiconductor devices, then data transfer is enabled, but signal distortion occurs due to large metal and gate loading
Solution Approach 1:
The patent applies signal inversion by inserting inverting units along the signal path to compensate for distortion. Each inverting unit inverts the signal phase, and by carefully controlling the number of inversions (even or odd), the original signal characteristics are restored at the destination, effectively counteracting the distortion caused by metal and gate loading.
Solution Approach 2:
The patent introduces inverting units as intermediary elements between the signal source and target units. These inverting units act as mediators that actively compensate for signal distortion by inverting the signal multiple times, thereby maintaining signal quality throughout the transmission path.
2Reliability
If inverting units are added to compensate signal distortion, then signal quality is improved, but device complexity increases
Solution Approach 1:
The patent changes the parameter of signal inversion count (even or odd number of times) to achieve different compensation effects. By adjusting this parameter based on the specific signal path characteristics, the system optimizes signal quality while managing complexity through parameter control rather than structural changes.
Data Source
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AI summary
Systems (100), methods, circuits, and apparatus for managing signal transfers in semiconductor devices are provided. In one aspect, an integrated circuit (300, 500, 600, 630, 700, 800) includes: one or more target units each configured to receive a signal and a plurality of inverting units arranged on signal paths (531, 533, 535) to the one or more target units. For each of the one or more target units, one or more corresponding inverting units of the plurality of inverting units are configured to invert the signal multiple times along a corresponding signal path (531, 533, 535) to the target unit to cause a signal width of the inverted signal received by the target unit to be substantially identical to a signal width of the signal.