Clock Circuit Duty Cycle Error Correction for Memory Systems
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Solution Overview
Problem
Current semiconductor memory systems face limitations in performance due to rigid timing constraints for command signals, which can result in less desirable memory operations and power consumption issues.
Innovation Solution
The implementation of a clock circuit with multiphase clock signals and a timing adjustment mechanism that corrects clock period and duty cycle errors, allowing for flexible timing of memory commands and reducing power consumption by adjusting signal transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If rigid timing constraints are applied to command signals, then timing precision is improved, but memory performance and power consumption deteriorate
Solution Approach 1:
The patent implements dynamic timing adjustment by detecting duty cycle errors in clock signals and adjusting the timing of command signals, address signals, and data signals accordingly. Instead of using fixed rigid timing constraints, the system adaptively modifies timing parameters based on actual clock signal characteristics, thereby maintaining timing precision while improving memory performance and reducing power consumption.
Solution Approach 2:
The patent changes the timing parameters of memory operations based on detected duty cycle errors. By monitoring the actual clock signal characteristics and adjusting timing parameters dynamically, the system resolves the contradiction between maintaining precise timing and achieving optimal memory performance with reduced power consumption.
2Measurement precision
If rigid timing constraints are applied to command signals, then timing precision is improved, but power consumption deteriorates
Solution Approach 1:
The system dynamically adjusts timing based on detected duty cycle errors rather than enforcing rigid constraints. This adaptive approach allows the memory system to operate with optimal power consumption while maintaining necessary timing precision by only making adjustments when and where needed.
Solution Approach 2:
By changing timing parameters adaptively based on actual clock signal conditions, the system avoids the excessive power consumption associated with rigid timing constraints while preserving timing precision where required.
3Productivity
If flexible timing of memory commands is implemented, then memory performance is improved, but timing precision deteriorates
Solution Approach 1:
The patent employs feedback mechanisms by detecting duty cycle errors in clock signals and using this information to adjust the timing of subsequent memory operations. This feedback loop ensures that flexible timing adjustments maintain the necessary timing precision, resolving the contradiction between flexibility and precision.
Solution Approach 2:
The system implements dynamic timing adjustment that provides flexibility for performance optimization while maintaining precision through adaptive correction based on detected clock signal characteristics.
4Device complexity
If clock signals are not aligned, then device complexity is reduced, but clock jitter increases
Solution Approach 1:
The patent uses feedback-based duty cycle error detection and correction to align clock signals. By monitoring clock signal characteristics and making corrective adjustments, the system achieves proper clock alignment without requiring complex pre-alignment mechanisms, thereby reducing device complexity while maintaining low clock jitter.
Solution Approach 2:
The system performs self-correction of clock alignment issues through automatic duty cycle error detection and adjustment, eliminating the need for external alignment mechanisms and reducing overall device complexity while maintaining reliability.
Data Source
AI summary
Apparatuses and methods for duty cycle error correction of clock signals are disclosed. An example method includes detecting a clock period error between a first clock signal and a third clock signal and adjusting a timing of the first or third clock signals based on the clock period error therebetween. The method further includes detecting a clock period error between a second clock signal and a fourth clock signal and adjusting a timing of the second or fourth clock signals based on the clock period error therebetween. Additionally, the example method includes detecting a duty cycle error between the first, second, third, and fourth clock signals, and adjusting a timing of the first and third or second and fourth clock signals based on the duty cycle error therebetween.