Output Driver Impedance Switching for Reliable I/O Signals
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Solution Overview
Problem
Conventional electronic devices with multiple integrated circuits face challenges in ensuring high-quality input/output signal control, leading to potential malfunctions and data errors, particularly in memory devices like RAM, which requires efficient signal driving control with minimal design efforts and fewer side effects.
Innovation Solution
A method and apparatus for signal driving control in electronic devices that generate specific driving control signals to manage impedance in signal paths, utilizing switching units to control voltage levels and output terminals, ensuring that the impedance of one signal path is less than another, thereby optimizing I/O signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional signal driving control is used in electronic devices with multiple integrated circuits, then the device complexity is reduced, but the signal quality deteriorates leading to malfunctions and data errors
Solution Approach 1:
The patent applies dynamics by making the impedance of signal paths dynamically adjustable through switching units. The impedance switching unit changes impedance based on the logical state of intermediate digital signals, allowing the system to adapt to different operating conditions and maintain high signal quality without requiring a completely complex control circuit architecture.
Solution Approach 2:
The patent changes the electrical parameter (impedance) of signal paths to optimize signal quality. By switching between different impedance values according to logical states, the system improves signal transmission characteristics and reduces errors without significantly increasing overall device complexity.
2Reliability
If impedance switching units are added to control signal paths, then signal quality is improved, but the device complexity increases
Solution Approach 1:
The patent segments the control function by dividing it into multiple switching units (first, second, third, fourth switching units) that operate on different signal paths. Each switching unit independently controls impedance of specific paths based on logical states, which distributes the complexity across modular components rather than requiring a single complex control mechanism.
Solution Approach 2:
The patent applies local quality by assigning different impedance characteristics to different signal paths based on their specific requirements. The first and second switching units control paths with different impedance values, optimizing signal quality for each path individually rather than using a uniform approach across all paths.
3Reliability
If multiple switching units with different impedances are used, then signal transmission reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent merges multiple switching units and impedance control functions into a coordinated system that operates based on logical states of intermediate digital signals. By combining the control logic and switching units into an integrated architecture, the system achieves high transmission reliability while simplifying the manufacturing process through standardized circuit design patterns.
Data Source
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AI summary
A method for performing signal driving control in an electronic device (100, 300) and an associated apparatus (100, 300) are provided. The method includes: generating a first driving control signal (MOD1) and a second driving control signal (MOD2) according to a data signal (DATA), wherein the second driving control signal (MOD2) transits in response to a transition of the data signal (DATA), and the first driving control signal (MOD1) includes a pulse corresponding to the transition of the data signal (DATA); and utilizing a first switching unit to control a first signal path between a first voltage level (LEVEL1, SUP1) and an output terminal (OUT) of an output stage according to the first driving control signal (MOD1), and utilizing a second switching unit to control a second signal path between the first voltage level (LEVEL1, SUP1) and the output terminal (OUT) according to the second driving control signal (MOD2), wherein a first impedance (Z1) of the first signal path is less than a second impedance (Z2) of the second signal path.