A Method For Universal Two-Tap Feed-Forward Equalization Using A Differential Element

Tech ID: 30448 / UC Case 2019-423-0

Brief Description

A fully tunable feed-forward equalizer with simplified addition and inversion operations that use a single differential element.


Feed-Forward Equalizers (FFEs) works by splitting a signal, and then inverting, attenuating, and delaying one part of the signal before adding the two branches together. Current FFE implementations use complex structures to perform addition and have more complex signal paths for each of the taps. Existing FFEs implemented with broadband power dividers also have an inherent loss of signal strength.


Researchers at the University of California, Santa Barbara have created a fully tunable FFE with simplified addition and inversion operations that use a single differential element, such as a differential amplifier or a differential optical modulator. This enables high speed performance for communication links, which is highly valuable for the ever increasing demand for faster and higher data rate optical links. The lower complexity application can potentially consume lower power, have a smaller chip area, and have higher tunability than existing chip-scale technology. These characteristics could lead to less engineering time and money spent designing and producing products based on the universal equalizer. 


  • Lower complexity 
  • Higher speed
  • Lower cost
  • Consume lower power
  • Maintains signal strength


  • Optical links inside data centers
  • Integrated circuits
  • Oscilloscopes
  • Wireline and communication technologies

Patent Status

Patent Pending


Learn About UC TechAlerts - Save Searches and receive new technology matches


  • Andrade, Hector
  • Buckwalter, James F.
  • Maharry, Aaron
  • Schow, Clint

Other Information


electronics, feed-forward equalizer, universal equalizer, architecture, differential

Categorized As