Data Output Circuit With Pattern-Based Drivability Control for Jitter
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Solution Overview
Problem
Integrated circuits face data jitter issues due to system influences, data patterns, and random noise, which degrade data reliability, and existing calibration and equalization circuits are bulky and consume significant power.
Innovation Solution
An integrated circuit with a drivability control circuit that generates signals based on data patterns to control data output sequentially using an internal clock signal, reducing jitter by activating drivability control signals for consecutive data of the same logic level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If calibration circuit or equalization circuit is mounted to overcome jitter, then data reliability is improved, but circuit dimension and power consumption increase
Solution Approach 1:
The patent segments the drivability control into multiple discrete stages corresponding to different data patterns. Instead of using a monolithic calibration circuit, the invention divides the control function into separate control signals (first drivability control signal, second drivability control signal, etc.) that are selectively applied based on specific data conditions, thereby reducing the overall circuit complexity and power consumption while maintaining jitter correction capability
Solution Approach 2:
The patent applies local quality by making the drivability control signal-dependent on local data patterns. The drivability control circuit generates different control signals based on the specific pattern of consecutive data values (e.g., when four or more consecutive data have the same logic level). This localized adaptation allows jitter correction to be applied precisely where needed rather than uniformly across all data, reducing unnecessary power consumption
2Reliability
If calibration circuit or equalization circuit is mounted to overcome jitter, then data reliability is improved, but circuit complexity increases
Solution Approach 1:
The patent segments the drivability control into multiple discrete stages corresponding to different data patterns. Instead of using a monolithic calibration circuit, the invention divides the control function into separate control signals (first drivability control signal, second drivability control signal, etc.) that are selectively applied based on specific data conditions, thereby reducing the overall circuit dimension while maintaining jitter correction capability
Solution Approach 2:
The patent implements dynamic drivability control where the control signals are adjusted in real-time based on the incoming data patterns. The drivability control circuit continuously monitors data patterns and selectively activates appropriate control signals, making the circuit adaptive rather than static. This dynamic approach replaces complex fixed calibration circuits with a simpler, data-driven control mechanism
3Reliability
If drivability control signal is activated for consecutive data of same logic level, then jitter is reduced, but power consumption increases
Solution Approach 1:
The patent applies local quality by making the drivability control signal-dependent on local data patterns. The drivability control circuit generates different control signals based on the specific pattern of consecutive data values (e.g., when four or more consecutive data have the same logic level). This localized adaptation allows jitter correction to be applied precisely where needed rather than uniformly across all data, reducing unnecessary power consumption
Solution Approach 2:
The patent employs partial action by activating drivability control signals only under specific conditions (certain data patterns) rather than continuously. The control circuit selectively applies jitter correction when data patterns indicate potential jitter issues (such as prolonged sequences of identical logic levels), and remains inactive otherwise, thereby achieving effective jitter reduction with minimized power consumption
Data Source
AI summary
An integrated circuit includes a drivability control circuit and a data output circuit. The drivability control circuit is configured to generate a drivability control signal based on data patterns of a plurality of pieces of data. The data output circuit is configured to control drivability, which is reflected to each of the plurality of pieces of data, based on the drivability control signal.