CPU Power Supply System Using Segmented VID Lines
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Solution Overview
Problem
The frequent changes in power supply standards for new generation CPUs, driven by manufacturers like Intel, lead to high development costs and lost business opportunities for vendors who cannot access design standards early, causing them to lag behind contracted vendors.
Innovation Solution
A power supply system for CPUs that includes a dynamic VID signal line set and a core voltage controller conforming to different standards, utilizing a reference voltage generator, pulse width modulator, and core voltage driver to adjust and output core voltage, with additional components like a virtual ground and switching component to match various voltage specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a new generation CPU with a new power supply standard is introduced, then the CPU performance and technology benefits are improved, but the development cost and time for parts vendors increase significantly
Solution Approach 1:
The dynamic VID signal lines are segmented into LSB signal lines and MSB signal lines. The core voltage controller only needs to respond to MSB signal lines, while LSB signal lines are handled differently, reducing the complexity of adapting to new standards
Solution Approach 2:
The core voltage controller is designed to be universal by making it responsive only to MSB signal lines, allowing it to work with different CPU generations and VID standards without requiring complete redesign
2Productivity
If design standards are provided only to contracted vendors before CPU launch, then contracted vendors can develop parts in advance, but non-contracted vendors fall far behind and lose business opportunities
Solution Approach 1:
The patent uses the public VID specification document as an intermediary that contains the VID-Vcore relationship table. This allows any vendor to determine the correct core voltage without needing early access to proprietary design standards, leveling the playing field for all vendors
Solution Approach 2:
The patent creates a simplified interface by copying only the essential MSB signal line responses from the full VID specification, allowing vendors to implement basic compatibility without needing the complete new standard documentation
3Ease of manufacture
If parts vendors develop new parts according to new standards after CPU launch, then they can avoid synchronous development costs, but they lose many business opportunities
Solution Approach 1:
The core voltage controller is pre-configured to respond to MSB signal lines according to existing VID specifications. This preliminary configuration allows vendors to prepare parts in advance using available information, reducing both development costs and time to market when new CPUs are launched
Data Source
AI summary
A power supply system for CPU is disclosed. The CPU includes a plurality of dynamic voltage identification (VID) pins, and the power supply standard of the CPU conforms to a first standard. The power supply system includes a dynamic VID signal line set and a core voltage controller. The VID signal line set is coupled to the VID pins of the CPU. The core voltage controller conforms to a second standard and is coupled to a partial line set of the dynamic VID signal line set. The core voltage controller determines a core voltage to be output to the CPU according to the partial line set to conform to the first standard.