Decoupling Capacitor Placement for Stable IC Voltage Transients

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Solution Overview

Problem

High-performance integrated circuit devices face challenges in maintaining stable voltage domains due to rapid changes in power demands, leading to transient response issues and operational failures, which existing decoupling capacitors may not adequately address, especially when placed far from target circuitry and optimized for worst-case manufacturing variability.

Innovation Solution

A method is introduced to iteratively apply load profiles across different populations of decoupling capacitors on a circuit board to achieve target transient performance, optimizing the quantity and placement of capacitors based on specific environmental conditions and device requirements, rather than relying on manufacturer-specified capacitance values.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If decoupling capacitors are placed on circuit board according to manufacturer specifications, then transient response stability is improved, but the quantity of capacitors increases and placement complexity increases

Engineering Contradiction:

Improvetransient response stabilityVSAvoidcapacitor placement complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent changes the parameter of capacitor quantity from fixed manufacturer-specified values to dynamically optimized values based on actual power demand profiles. By analyzing real power consumption data and adjusting capacitor quantities accordingly, the system achieves transient response stability with fewer capacitors, reducing placement complexity while maintaining reliability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces dynamic optimization of capacitor placement by adjusting capacitor quantities based on varying power demand characteristics. Instead of static worst-case design, the system adapts capacitor configuration to match actual operational requirements, reducing the number of capacitors needed while maintaining transient response stability.

Inventive Principle:

Principle #15Dynamics

2Reliability

If manufacturer-specified capacitance values are used, then transient effects are reduced, but power consumption increases and operating temperature rises

Engineering Contradiction:

Improvetransient effect reductionVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by stationary object

Solution Approach 1:

The patent applies partial action by using only the necessary amount of capacitance required to handle actual power transient effects, rather than the excessive capacitance specified for worst-case scenarios. By optimizing capacitor quantities based on real power demand profiles, the system achieves sufficient transient effect reduction with reduced capacitor populations, thereby lowering power consumption and operating temperature.

Inventive Principle:

Principle #16Partial or excessive action

3Ease of manufacture

If decoupling capacitors are placed far from target circuitry, then manufacturing ease is improved, but effectiveness in reducing transient effects decreases

Engineering Contradiction:

Improvecapacitor placement easeVSAvoidtransient effect reduction effectiveness

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent applies local quality by optimizing capacitor placement specifically at locations most effective for reducing transient effects on power delivery networks, rather than uniform distribution. By identifying critical areas where transient effects occur and placing capacitors locally at those positions, the system achieves high effectiveness with fewer capacitors, simplifying manufacturing while maintaining reliability.

Inventive Principle:

Principle #3Local quality

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

This approach reduces the number of capacitors needed, lowers power consumption, and decreases operating temperatures, while ensuring stable power delivery and extended component lifetime by optimizing decoupling capacitor placement and population for specific integrated circuit devices.

Implementation Method 1

Decoupling capacitors can be employed to reduce transient effects related to power demands, such as ripples, spikes, or dips

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS11921565B2Load adjusted populations of integrated circuit decoupling capacitors

Publication Date: 2024.03.05 MICROSOFT TECHNOLOGY LICENSING LLC

AI summary

Techniques and systems for enhanced adjustment of quantities and placement of decoupling capacitance on circuit boards for integrated circuits is provided herein. An example method includes iterating application of a load profile across different populations of decoupling capacitors on a circuit board for supply voltage domains of an integrated circuit device until a target transient performance is reached for the supply voltage domains. The load profile is applied onto electrical connections corresponding to the supply voltage domains for the integrated circuit device. The method also includes generating a capacitor population configuration for the circuit board based on a population of the decoupling capacitors that achieves the target transient performance.