Clock Receiver Timing Calibration for Voltage and Temperature Jitter
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Jitter in clock signals due to changes in voltage and temperature can cause semiconductor devices to process data incorrectly, leading to data loss or system failure, necessitating efficient timing adjustments.
Innovation Solution
A semiconductor device with a receiving circuit, oscillator code generation circuit, and control circuit that generates an oscillation signal with a period N times the clock delay time, allowing for precise timing adjustments through initial and additional oscillator operations, minimizing the need for extensive training operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If extensive training operations are performed to determine clock delay time, then timing accuracy is improved, but system initialization time increases
Solution Approach 1:
The patent performs preliminary training operations during manufacturing to determine initial clock delay time characteristics, storing these results for later use. This preliminary action eliminates the need for extensive training during system initialization, thereby maintaining high timing accuracy while significantly reducing initialization time.
Solution Approach 2:
The patent creates a copy of the clock delay time characteristics determined during manufacturing training operations. This copied information is stored in memory and reused during system operation, avoiding the need to repeat extensive training operations and thus reducing initialization time while maintaining accuracy.
2Adaptability or versatility
If clock delay time changes due to voltage and temperature variations, then timing accuracy deteriorates, but system adaptability requires additional adjustment mechanisms
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors voltage and temperature conditions, compares actual clock delay time against reference values stored from training operations, and generates adjustment signals to compensate for deviations. This feedback loop maintains timing accuracy despite environmental variations while providing necessary system adaptability.
Solution Approach 2:
The patent adjusts timing parameters dynamically based on detected voltage and temperature conditions. By changing operational parameters such as clock timing values according to environmental conditions, the system maintains accurate timing while adapting to varying operating conditions.
Data Source
AI summary
A semiconductor device includes a receiving circuit, an oscillator code generation circuit, and a control circuit. The receiving circuit receives a clock signal and data, delays the clock signal by a clock delay time to generate an internal clock signal, and captures the data with the internal clock signal. The oscillator code generation circuit generates an oscillation signal having a period of N times the clock delay time, wherein N is a positive integer, and generates an oscillator code based on the oscillation signal. The control circuit controls the oscillator code generation circuit in response to at least one external signal. The at least one external signal including a chip enable signal.