Photonic Matrix-Vector Processor With Digital Equalization Bandwidth Extension

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Solution Overview

Problem

Conventional computing systems face speed and efficiency limitations due to parasitic capacitance in electrical interconnects, leading to significant delays and inefficiencies, especially in data-intensive applications like high-frequency stock trading and machine learning, where delays of a few hundredths of a second can render algorithms unfeasible.

Innovation Solution

A hybrid analog-digital processing system utilizing a photonic accelerator for matrix-vector multiplication, coupled with analog-to-digital converters and digital equalizers, enables faster clock frequencies by overcoming parasitic capacitance through digital equalization techniques such as pre-emphasis and continuous time linear equalization, allowing for clock frequencies exceeding 10 GHz.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If conventional electrical processing systems are used, then device complexity is manageable, but processing speed is limited due to parasitic capacitance

Engineering Contradiction:

Improveprocessing speedVSAvoiddevice complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The patent replaces conventional electrical processing systems with a photonic processing system that uses light instead of electrical signals. This substitution eliminates parasitic capacitance effects that limit electrical system speed, enabling processing frequencies exceeding 10 GHz while maintaining manageable device complexity through integrated photonic circuit design.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fundamental operating parameter from electrical signals to optical signals. By using photonic accelerators that process data through light-based matrix-vector multiplication, the system achieves significantly higher processing speeds without being constrained by electrical parasitic capacitance, while the frequency response can be extended beyond the photonic accelerator's native bandwidth through digital equalization.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If photonic accelerator bandwidth is increased, then data throughput improves, but inter-calculation-interference increases

Engineering Contradiction:

Improvedata throughputVSAvoidinter-calculation-interference

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements digital equalizers that use feedback mechanisms to compensate for inter-calculation-interference. The equalizers process the output from the photonic accelerator and apply corrective transformations that eliminate interference artifacts, allowing the system to operate at higher bandwidths and data throughput levels while maintaining calculation accuracy.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent introduces digital equalizers as intermediary components between the photonic accelerator and the final output. These equalizers act as mediators that receive the raw photonic computation results, apply interference removal algorithms, and produce cleaned output data, thereby enabling high-speed operation without sacrificing reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Speed

If clock frequency is increased beyond conventional limits, then processing speed improves, but parasitic capacitance effects worsen

Engineering Contradiction:

Improveclock frequencyVSAvoidparasitic capacitance

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent substitutes electrical signal processing with photonic signal processing to operate at clock frequencies exceeding 10 GHz. By using light-based computation in the photonic accelerator, the system avoids parasitic capacitance entirely, as optical signals are not affected by electrical capacitance effects that plague conventional electrical systems at high frequencies.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

The system achieves significantly improved data throughput and efficiency by reducing inter-calculation-interference, supporting clock frequencies up to 20 GHz, surpassing conventional processors.

Implementation Method 1

a photonic accelerator configured to perform matrix-vector multiplication using light

Methodology Applied

Scientific EffectLight: Light

Implementation Method 2

a plurality of analog-to-digital converters (ADCs) coupled to the photonic accelerator

Methodology Applied

Scientific EffectPhotoelectric Effect: Photoelectric Effect

Data Source

PatentUS20250258514A1Fast prediction processor

Publication Date: 2025.08.14 LIGHTMATTER INC

AI summary

Hybrid analog-digital processing systems are described. An example of a hybrid analog-digital processing system includes photonic accelerator configured to perform matrix-vector multiplication using light. The photonic accelerator exhibits a frequency response having a first bandwidth (e.g., less than 3 GHz). The hybrid analog-digital processing system further includes a plurality of analog-to-digital converters (ADCs) coupled to the photonic accelerator, and a plurality of digital equalizers coupled to the plurality of ADCs, wherein the digital equalizers are configured to set a frequency response of the hybrid analog-digital processing system to a second bandwidth greater than the first bandwidth.