Charge-Recovery Data Output Circuit for High-Speed Low-Power I/O
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Solution Overview
Problem
Semiconductor devices face challenges in achieving high-speed operation with low power consumption, as increasing the number of data lines or operation frequency often leads to increased power consumption, making it difficult to implement efficient data transmission without significant power increases.
Innovation Solution
A data output circuit that includes a data driving unit and a charging/discharging unit, which drives data transmission lines with a driving voltage corresponding to the data and stores charges for reuse as a recovery power driving voltage, allowing for efficient power management during data transmission operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of data lines is increased to achieve high-speed data transmission, then the data transmission capacity is improved, but the power consumption is increased
Solution Approach 1:
The patent recovers energy from the data transmission line after data transmission by using a charging unit to store the remaining voltage as recovery power, which is then reused to drive the data transmission line in subsequent operations, reducing overall power consumption while maintaining high data transmission capacity
Solution Approach 2:
The system uses its own transmitted data energy to power subsequent transmissions by charging the transmission line capacitance during data transmission and then discharging it to drive the next transmission cycle, making the system partially self-powered
2Speed
If the operation frequency is raised to achieve high-speed operation, then the data transmission speed is improved, but the power consumption is increased
Solution Approach 1:
The patent recovers energy from the data transmission line after each transmission cycle by charging the capacitance of the transmission line, storing the recovery power, and reusing it for subsequent high-frequency transmission operations, enabling high-speed operation with reduced power consumption
Solution Approach 2:
The system maintains continuous data transmission at high frequency by seamlessly integrating the charging phase (energy recovery) and discharging phase (energy reuse) into the transmission cycle, ensuring uninterrupted high-speed operation
3Productivity
If more data lines are added to increase data transmission capacity, then the productivity is improved, but the device complexity is increased
Solution Approach 1:
The charging unit serves multiple functions: it charges the data transmission line capacitance during data transmission, stores the remaining energy as recovery power, and provides charged power for subsequent transmissions, making a single component perform multiple critical functions across all data lines
Solution Approach 2:
The patent merges the charging function, energy storage function, and power supply function into a single integrated charging unit that operates across all data transmission lines, reducing the need for separate components for each line and simplifying the overall circuit architecture
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 solution enables efficient power consumption reduction in data transmission operations by reusing energy, allowing for high-speed operation without increasing the number of data lines or operation frequency, thereby minimizing power consumption.
Implementation Method 1
a charging/discharging unit suitable for storing charges on the data transmission line and reuse the stored charges as the driving voltage
Data Source
AI summary
A data output circuit includes a data driving unit suitable for driving a data transmission line with a driving voltage corresponding to data during a data transmission operation, and a charging/discharging unit suitable for storing charges on the data transmission line and reuse the stored charges as the driving voltage.