Pumping Voltage Circuit Dynamic Force Control
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Solution Overview
Problem
Existing semiconductor memory devices face malfunctions and overshoots due to mismatched total pumping force in the pumping voltage generating circuit compared to self-refresh charge consumption.
Innovation Solution
A pumping voltage generating circuit that includes a control information generating block, a pumping generation block, and a level detection block, which collectively control the total pumping force to match self-refresh charge consumption by adjusting the number of pulses of the refresh sequential signal within a target range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the total pumping force is excessively small, then the pumping voltage generating circuit is simple and low-power, but the pumping voltage level takes a long time to reach target level causing device malfunction
Solution Approach 1:
The patent implements dynamic control of the pumping driver's total pumping force based on real-time detection of pumping voltage level. The control circuit adjusts the pumping force adaptively during operation, transitioning from a static fixed-force design to a dynamic adjustable-force system that responds to actual voltage conditions, thereby resolving the contradiction between speed and complexity
Solution Approach 2:
The patent introduces a feedback mechanism where the level detection block continuously monitors the pumping voltage level and provides this information to the control circuit. The control circuit uses this feedback to adjust the pumping driver's force output, creating a closed-loop control system that ensures timely voltage generation while avoiding excessive complexity through intelligent regulation
2Speed
If the total pumping force is excessively large, then the pumping voltage level reaches target level quickly, but overshoot occurs where voltage level becomes significantly outside target level
Solution Approach 1:
The patent employs dynamic adjustment of pumping force based on real-time voltage level detection. Rather than using a fixed excessive pumping force, the system continuously adapts the force magnitude to match actual needs, enabling fast response when needed while preventing overshoot through real-time correction, thus resolving the speed-stability contradiction
Solution Approach 2:
The feedback mechanism detects when the pumping voltage reaches or exceeds the target level and automatically adjusts the pumping driver's force accordingly. This closed-loop control prevents overshoot by reducing or stopping the pumping action once the target is achieved, while maintaining fast response capability through proactive adjustment, thereby solving the contradiction between speed and stability
3Reliability
If the total pumping force is precisely controlled to match self-refresh charge consumption, then pumping voltage stability is improved, but the control mechanism becomes more complex
Solution Approach 1:
The patent implements a self-regulating system where the level detection block automatically monitors pumping voltage and the control circuit autonomously adjusts the pumping driver without external intervention. This self-service mechanism achieves precise voltage control and stability while minimizing the need for complex external control systems, thereby resolving the contradiction between precision and complexity
Solution Approach 2:
The feedback-based control system automatically adjusts pumping force based on real-time voltage detection, enabling precise control of total pumping force to match self-refresh charge consumption. The closed-loop mechanism handles the complexity internally through intelligent regulation, achieving voltage stability without requiring overly complex external control mechanisms
Data Source
AI summary
A pumping voltage generating circuit can include a control information generating block receiving a pumping enable signal and a refresh sequential signal and generating driving force control information, the driving force control information controlled so that a number of pulses of the refresh sequential signal falling within a target pulse number range is generated during the generation of pulses of the pumping enable signal which have the pumping reference number, a pumping generation block generating a pumping voltage with a total pumping force, the total pumping force depending on the data value of the driving force control information, and a level detection block detecting a level of the pumping voltage and generating the pumping enable signal, the pumping enable signal activated when the level of the pumping voltage is outside a target level range, and deactivated when the level of the pumping voltage falls within the target level range.