Multi-Sense Point Voltage Regulator for IC Stability
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Solution Overview
Problem
Traditional single sense point voltage regulators are inadequate in accurately monitoring and regulating voltage across multiple regions of an IC die, especially in power-gated regions, leading to insufficient output voltage and instability due to reliance on fixed sense points and comparator-switch networks.
Innovation Solution
A multi-sense point voltage regulator system utilizing a smooth multiplexer selector circuit and RC circuit, capable of seamlessly switching between sensed voltages and monitoring multiple points, including power-gated regions, to generate a regulated output voltage based on the lowest detected voltage, implemented in a CMOS architecture for stability and low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sense point voltage regulator is used, then the device complexity is reduced, but the measurement precision of voltage across multiple IC die regions deteriorates
Solution Approach 1:
The patent divides the single voltage monitoring function into multiple sense points distributed across different IC die regions. Each sense point independently monitors local voltage conditions, enabling precise detection of voltage drops in specific regions including power-gated areas without requiring a completely complex regulator architecture.
Solution Approach 2:
The patent transitions from single-point voltage monitoring to multi-point spatial distribution of sense points across the IC die. This dimensional expansion allows the system to capture voltage variations across different locations simultaneously, improving measurement precision while maintaining manageable device complexity through systematic architecture.
2Device complexity
If fixed sense points are used in traditional voltage regulators, then the device complexity is reduced, but the adaptability to dynamic power states and regions deteriorates
Solution Approach 1:
The patent implements dynamic sense point selection through comparator-switch networks that can adaptively activate or deactivate sense points based on real-time power states of different IC die regions. This allows the voltage regulator to respond to dynamic changes in power consumption patterns and operational states across multiple regions, significantly improving adaptability.
Solution Approach 2:
The patent employs feedback mechanisms where comparators continuously monitor voltages at multiple sense points and switch between them based on detected conditions. This feedback-driven approach enables the system to automatically adapt to changing power states and select the most appropriate sense point for regulation, enhancing versatility without proportionally increasing complexity.
3Adaptability or versatility
If comparator-switch networks are used for sense point selection, then the adaptability to different power states is improved, but the stability of voltage regulation deteriorates
Solution Approach 1:
The patent incorporates RC circuits as compensation networks that provide beforehand cushioning against abrupt voltage transitions when switching between sense points. These circuits smooth out rapid changes in the feedback signal, preventing instability and oscillations that would otherwise occur during sense point transitions, thus maintaining voltage regulation stability while preserving adaptability.
4Measurement precision
If multiple sense points are monitored including power-gated regions, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent merges the functions of multiple sense points, comparators, switches, and RC compensation circuits into an integrated voltage regulation system. By combining these elements into a coordinated architecture where comparators selectively activate sense points and RC circuits provide unified compensation, the system achieves high measurement precision across multiple regions while managing overall complexity through functional integration.
Data Source
AI summary
Multi-sense point voltage regulator systems are provided for usage in conjunction with power-regulated devices, such as system-on-chip and microcontroller unit devices. In embodiments, the multi-sense point voltage regulator system includes a multiplexer selector circuit and a voltage regulator. The multiplexer selector circuit is configured to: (i) monitor a local voltages at multiple sense points within an integrated circuit (IC) die circuit structure; and (ii) generate a feedback voltage indicative of a lowest one of the monitored local voltages. The voltage regulator is configured to generate a regulated power supply output voltage as a function of a differential between the feedback voltage and the reference voltage, with the regulated power supply output voltage provided to the IC die circuit structure to drive operation thereof.