Multi-Stage Cable Equalizer for Flexible High-Frequency Loss Compensation

Solution Overview

Problem

Existing cable equalizers face challenges in effectively compensating attenuation loss in transmission cables due to their length, particularly at high frequencies, with fixed gain equalizers lacking flexibility and adjustable gain equalizers being costly and complex.

Innovation Solution

A multi-stage cable equalizer comprising a fixed gain device and an adjustable gain device, where the fixed gain device compensates signal loss at the major band and the adjustable gain device addresses loss in respective higher frequency bands, reducing cost and maintaining flexibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an adjustable gain equalizer is used to compensate signal loss at different frequencies, then the compensation flexibility is improved, but the device complexity and cost increase

Engineering Contradiction:

Improvecompensation flexibilityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The equalizer is divided into multiple stages, with the first stage providing fixed gain compensation and the second stage providing adjustable gain compensation. This segmentation allows the system to achieve both flexibility and reduced complexity by separating the compensation functions into distinct modules that can be independently optimized.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If a fixed gain equalizer is used to compensate signal loss, then the device complexity is reduced, but the compensation flexibility deteriorates

Engineering Contradiction:

Improvedevice complexityVSAvoidcompensation flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The equalizer is divided into multiple stages, with the first stage providing fixed gain compensation and the second stage providing adjustable gain compensation. This segmentation allows the system to achieve both flexibility and reduced complexity by separating the compensation functions into distinct modules that can be independently optimized.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If an adjustable gain equalizer is used to compensate signal loss, then the compensation flexibility is improved, but the manufacturing cost increases

Engineering Contradiction:

Improvecompensation flexibilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The equalizer is divided into multiple stages, with the first stage providing fixed gain compensation and the second stage providing adjustable gain compensation. This segmentation allows the system to achieve both flexibility and reduced complexity by separating the compensation functions into distinct modules that can be independently optimized.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS7668236B2Multi-stage cable equalizer

Publication Date: 2010.02.23 MEDIATEK INC

AI summary

The present invention discloses a multi-stage cable equalizer, comprising a fixed gain device and an adjustable gain device. The fixed gain device compensates the loss caused by the cable at a major band, and the adjustable gain device further compensates the loss at adjusted bands. The multi-stage cable equalizer of the present invention exhibits advantages in design flexibility and reduced cost.