Adaptive Body Biasing Mesh for IC Design Flow Optimization
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Solution Overview
Problem
Conventional integrated circuit design methodologies do not incorporate adaptive body biasing at the design implementation level, leading to inefficiencies in area, power, and speed, as designs are taped out at traditional corners without considering voltage threshold variations.
Innovation Solution
Incorporating adaptive body biasing into the integrated circuit design flow by adding adaptive body biasing inputs during the bonding layout stage, generating an adaptive body biasing mesh, and defining new design closure and sign-off corners that account for voltage threshold variations, process corners, and temperature variations to optimize power, area, and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If adaptive body biasing is incorporated into the design flow, then power reduction and performance improvement are achieved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The patent applies preliminary action by incorporating adaptive body biasing I/Os during the bonding layout stage and generating body biasing meshes before tape-out. This allows the design to be optimized for power and performance early in the design flow, rather than as a post-processing step, thereby achieving power reduction without proportionally increasing final device complexity
Solution Approach 2:
The patent utilizes parameter changes by adjusting body biasing voltages (Vbb) as a new static timing analysis parameter along with VDD. By defining new design closure and sign-off corners that account for voltage threshold variations, process corners, and temperature variations, the system dynamically optimizes power consumption and performance through controlled parameter variation
2Ease of manufacture
If adaptive body biasing is applied as post-processing, then implementation simplicity is maintained, but area, power, and speed optimization are lost
Solution Approach 1:
The patent resolves this contradiction by performing preliminary actions - incorporating adaptive body biasing I/Os during the bonding layout stage and generating body biasing meshes before tape-out. This early integration enables area, power, and speed optimization to be built into the design itself, making the optimizations permanent rather than temporary post-processing adjustments
3Ease of manufacture
If designs are taped out at traditional corners, then manufacturing simplicity is maintained, but area, power, and speed performance deteriorate
Solution Approach 1:
The patent applies parameter changes by defining new design closure and sign-off corners that account for body biasing voltage (Vbb) along with VDD, process corners, and temperature variations. This allows the tape-out to incorporate multiple optimized corners rather than traditional single-corner designs, thereby improving area, power, and speed performance while maintaining manufacturing feasibility through systematic corner analysis
4Loss of time
If conventional design methodology is used, then design closure time is reduced, but power reduction and performance improvement opportunities are missed
Solution Approach 1:
The patent resolves this contradiction by performing preliminary actions - incorporating adaptive body biasing I/Os during the bonding layout stage and generating body biasing meshes before tape-out. This early integration enables power optimization to be built into the design flow itself, making power reduction achievable without extending the overall design closure timeline
Data Source
AI summary
A method incorporating adaptive body biasing into an integrated circuit design flow includes the steps of (A) adding adaptive body biasing input/outputs (I/Os) during a bonding layout stage of the integrated circuit design flow, (B) floorplanning the integrated circuit design, (C) generating an adaptive body biasing mesh and (D) generating a layout of the integrated circuit design based upon a plurality of adaptive body biasing corners.