Voltage Source Transition Synchronization for Stable Supply Rails
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Solution Overview
Problem
Modern integrated circuits face challenges in maintaining a stable supply voltage when transitioning between different voltage sources, particularly due to voltage drops during high load currents, which can lead to inefficient power usage and potential data loss in components like memory cell arrays.
Innovation Solution
A voltage synchronization system that synchronizes transitions between voltage sources by deactivating one source and pre-biasing the other to maintain a stable voltage level, preventing current flow from one source to another and using control signals to manage power supply regulators and current sinks, ensuring seamless transitions and reduced power losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If voltage VccAux is used to provide supply voltage Vgg through a power supply regulator, then the voltage level can be maintained relatively constant even when load current varies, but the power regulation process results in energy loss
Solution Approach 1:
The patent applies preliminary action by pre-biasing the voltage source before transition. Specifically, the first voltage source is pre-biased with a voltage pre-bias to facilitate the second transition from the second voltage source to the first voltage source, ensuring smooth switching without voltage drops or instability during the transition process.
Solution Approach 2:
The patent implements dynamics by making the voltage source selection adaptive based on operating conditions. The system dynamically switches between using VccAux with power regulation and Vdd directly based on power requirements and load conditions, optimizing both energy efficiency and voltage stability in different operational scenarios.
2Loss of energy
If voltage Vdd is used to provide supply voltage Vgg directly, then energy efficiency is improved, but voltage drops occur when high load currents are encountered
Solution Approach 1:
The patent applies preliminary action by pre-biasing the first voltage source before transition. The first voltage source is pre-biased with a voltage pre-bias to facilitate the second transition from the second voltage source to the first voltage source, ensuring smooth switching without voltage drops or instability during the transition process.
Solution Approach 2:
The patent implements parameter changes by adjusting the voltage levels and bias conditions of the voltage sources based on load requirements. The system changes operating parameters such as voltage levels and bias currents to optimize performance for different load conditions, switching between regulated and unregulated modes as needed.
3Stability of the object's composition
If transitions between voltage sources are not synchronized, then voltage fluctuations and current flow between sources may occur, but the transition process becomes complex and time-consuming
Solution Approach 1:
The patent applies preliminary action by pre-biasing the first voltage source before transition. The first voltage source is pre-biased with a voltage pre-bias to facilitate the second transition from the second voltage source to the first voltage source, ensuring smooth switching without voltage drops or instability during the transition process.
Solution Approach 2:
The patent implements feedback by using control signals to monitor and manage the transition process between voltage sources. The system receives control signals that indicate whether to initiate transitions and uses this feedback information to coordinate the switching of voltage sources, ensuring synchronized operation and preventing voltage fluctuations.
Data Source
AI summary
A method of synchronizing transitions between voltage sources that are used to provide a supply voltage. A first control signal (CSclamp) that indicates whether to initiate a first transition from a first voltage source to a second voltage source to provide the supply voltage (Vgg). When the first control signal indicates to initiate a first transition from a first voltage source to a second voltage source to provide the supply voltage, the first voltage source can be deactivated from providing the supply voltage. In addition, the first voltage source can be pre-biased with a voltage pre-bias to facilitate a second transition from the second voltage source to the first voltage source. Further, the second voltage source can be activated to provide the supply voltage.