Power Bouncing Reduction Circuit for IC Voltage Stability
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Solution Overview
Problem
Integrated circuits experience power bouncing due to sudden surges in current, which reduces reliability and is typically alleviated by using a low inductance package, but this is costly.
Innovation Solution
A power bouncing reduction circuit comprising a high-pass filter, amplifier, and negative-feedback loop, including a source follower or class-AB output stage, stabilizes the internal power supply voltage by sourcing a steady quiescent current in response to voltage changes, using a package with standard inductance levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lower inductance package is used to reduce power bouncing, then power bouncing is reduced, but the cost increases
Solution Approach 1:
The patent introduces a power bouncing reduction circuit as an intermediary component between the power supply and the integrated circuit. This circuit includes a high-pass filter, amplifier, and output stage that work together to detect voltage droops and provide compensating current, thereby reducing power bouncing without requiring a more expensive low-inductance package
Solution Approach 2:
The power bouncing reduction circuit employs feedback mechanisms where the high-pass filter detects changes in the internal power supply voltage, the amplifier processes these signals, and the output stage adjusts the current accordingly. This closed-loop feedback system dynamically compensates for voltage droops caused by sudden current surges, achieving power bouncing reduction through active control rather than passive package design
2Reliability
If a power bouncing reduction circuit is added to stabilize internal power supply voltage, then power bouncing is reduced, but device complexity increases
Solution Approach 1:
The power bouncing reduction circuit is segmented into three functional modules: a high-pass filter stage for detecting voltage changes, an amplifier stage for signal processing, and an output stage for current delivery. This segmentation allows each module to be optimized independently and simplifies the overall design and implementation of the power bouncing reduction functionality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively reduces power bouncing without the need for low inductance packages, maintaining reliability while controlling power consumption through biasing voltage adjustments.
Implementation Method 1
the change of voltage at the first internal power supply node is detected by a high-pass filter
Implementation Method 2
an amplifier, and an output stage configured in a negative-feedback loop to stabilize the voltage
Implementation Method 3
an amplifier, and an output stage configured in a negative-feedback loop to stabilize the voltage at the first internal power supply node
Data Source
AI summary
A circuit is provided having a core circuit for sinking a first current from a first internal power supply node, a power bouncing reduction circuit for receiving power from a second internal power supply node and sourcing a second current to the first internal power supply node in accordance with a change of voltage at the first internal power supply node, and a package for coupling the first internal power supply node and the second internal power supply node to a first external power supply node and a second external power supply node, respectively. A corresponding method is also provided.