Multi-Level Driver Circuit With Feedback-Widened Data Pulses
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Solution Overview
Problem
In semiconductor integrated circuits, three-state drivers experience significant variations due to manufacturing processes, voltage, and temperature changes, leading to short output drive times and incomplete data transmission, causing data confusion and errors.
Innovation Solution
A multi-level drive data transmission circuit and method that includes feedback paths to generate control signals with wider effective signal widths, ensuring complete data transmission by processing the control signal through a first signal generating unit and providing it to the three-state driver, with additional signal shaping units to improve signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional three-state driver is used for bus transmission, then the circuit structure is simple, but the effective signal width becomes too short due to process, voltage, and temperature variations, causing incomplete data transmission
Solution Approach 1:
The patent introduces a feedback mechanism where the control signal is fed back through a feedback path to the signal generating unit. This feedback allows the system to detect when data transmission is incomplete and extend the control signal width accordingly, ensuring complete data transmission while maintaining a relatively simple circuit structure.
Solution Approach 2:
The signal generating unit generates the control signal in advance based on the input signal, and the feedback mechanism prepares to extend the signal width if needed. This preliminary action ensures that the control signal is ready before data transmission begins, preventing incomplete transmission without requiring complex real-time adjustment circuits.
2Reliability
If the control signal width is increased to ensure complete data transmission, then data transmission reliability improves, but the signal width becomes excessively wide causing data confusion at different beats
Solution Approach 1:
The feedback path monitors the actual data transmission status and provides information to the signal generating unit. This allows the control signal width to be extended only to the minimum necessary amount to complete transmission, avoiding excessive width that would cause data confusion at different beats.
Solution Approach 2:
The control signal width is made dynamic rather than fixed. The signal generating unit adjusts the signal width based on feedback information about transmission status, process conditions, voltage, and temperature, allowing the system to optimize the signal width for each transmission cycle rather than using a consistently wide signal.
3Productivity
If the control signal width is reduced to maintain tight timing, then signal efficiency improves, but data transmission becomes incomplete under process and temperature variations
Solution Approach 1:
The feedback mechanism detects when a narrow control signal results in incomplete data transmission and triggers an extension of the signal width. This allows the system to maintain narrow signals for efficiency when conditions permit, while automatically extending the signal when process, voltage, or temperature variations cause transmission failures.
Solution Approach 2:
The system dynamically changes the control signal width parameter based on operating conditions. The signal generating unit adjusts the signal width according to feedback information about transmission status and environmental factors, optimizing between narrow signals for efficiency and wider signals for reliability under varying conditions.
Data Source
AI summary
The disclosed multi-level driving data transmission circuit and operating method include: a first driving module including a first signal generating unit and a first three-state driver, and a second driving module, including a second three-state driver. The first input terminal of the second three-state driver is coupled to the output terminal of the first three-state driver. The first signal generating unit includes a first and second input terminals, and an output terminal. The output terminal of the first signal generating unit couples to the second input terminal of the first three-state driver. The first signal generating unit receives the first signal through its first input terminal and the first feedback signal of the first signal from the second driving module through its second input terminal. The resultant first control signal has an effective signal width wider than the first signal. The first control signal inputs to the first three-state driver.