Thursday, May 5, 2022

CTLE with Ferroelectric Capacitor

 D. Borah, A. Gupta, T. S. Kalkur and K. Miller, "A 5-Gb/s Adaptive Continuous Time Linear Equalizer Using Ferroelectric Capacitor," in IEEE Transactions on Components, Packaging and Manufacturing Technology, vol. 12, no. 4, pp. 647-654, April 2022, doi: 10.1109/TCPMT.2022.3158933.

  • The introduction has a nice survey of the different techniques to adaptively select CTLE settings. "slicer-based power sensing method" and the "spectrum balancing method".  
  • CTLEs typically use capacitors with discrete settings but they propose a barium strontium titanate (BST) capacitors that varies continuously. 
  • The capacitor they consider "offers high linearity, high power capability, and low leakage current which makes it suitable for mobile phone applications and dedicated RF tunable applications."
  • I stopped reading after the introduction.  This looks like a cool technology to keep an eye on.