3D-IC TSV Differential Sensing Charge Sharing
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Solution Overview
Problem
In 3D stacked chip devices, the high loading issue and power consumption due to pre-charge of Through-Silicon-Via (TSV) connections, particularly affecting higher level chip layers, necessitate an improvement in differential sensing and charge sharing schemes to enhance efficiency and reliability.
Innovation Solution
A 3D-IC differential sensing and charge sharing scheme is introduced, featuring high loading structures, tracking circuits, clamping circuits, and equaling circuits that include MOS transistors and sense amplifiers, which activate sensing circuits when TSV voltage exceeds a specified range, allowing for charge sharing and reduced power consumption by eliminating the need for pre-charging each TSV structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If pre-charge is applied to each TSV structure to ensure proper voltage levels, then voltage stability is improved, but power consumption increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-charging only selected TSV structures based on differential sensing results rather than pre-charging all TSV structures. The sensing circuit first detects which TSV structures require pre-charge, then activates equaling circuits only for those specific structures, thereby reducing overall power consumption while maintaining voltage stability where needed.
Solution Approach 2:
The patent implements local quality by applying pre-charge selectively to specific TSV structures rather than uniformly to all TSV structures. The equaling circuits are activated locally based on the differential sensing output, ensuring that pre-charge is applied only where voltage instability is detected, thus optimizing the balance between voltage stability and power consumption.
2Use of energy by moving object
If differential sensing is implemented to identify TSV voltage status, then power consumption is reduced by avoiding unnecessary pre-charge, but device complexity increases
Solution Approach 1:
The patent merges the sensing and equaling functions into an integrated circuit architecture. The sensing circuit and equaling circuits are combined in a coordinated system where the sensing output directly controls the equaling circuit activation, reducing overall device complexity compared to having separate independent sensing and pre-charge control systems.
Solution Approach 2:
The differential sensing circuit automatically identifies which TSV structures require pre-charge and the equaling circuits self-activate based on the sensing output. This self-service mechanism eliminates the need for external control logic to determine pre-charge requirements, thereby reducing device complexity while achieving power consumption reduction.
3Use of energy by moving object
If equaling circuits are used to share charge between TSV structures, then power consumption is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent uses parameter changes by dynamically adjusting the activation state of equaling circuits based on sensed voltage conditions. The equaling circuits modify their operation parameters (activation/deactivation) based on real-time voltage status, allowing the system to adapt to manufacturing variations while maintaining power consumption reduction benefits.
Solution Approach 2:
The patent implements dynamics by making the equaling circuit activation dynamic rather than static. The equaling circuits are activated or deactivated based on real-time differential sensing results, allowing the system to adapt to manufacturing precision variations and maintain optimal power consumption across different operating conditions.
Data Source
AI summary
The present invention discloses a 3D-IC differential sensing and charge sharing scheme which includes a plurality of TSVs including a first TSV and a second TSV. A tracking circuit is coupled to the first TSV. A sensing circuit is coupled to the second TSV and the tracking circuit. A plurality of equaling circuits are provided and wherein each of equaling circuit is configured and electrically connected between adjacent two equaling circuits. A clamping circuit is coupled to the first TSV.