Quarter-rate charge-steering decision feedback equalizer (DFE)
US10554453B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2019 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Apr 9, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03509
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A decision feedback equalizer (DFE) comprises four charge-steering (CS) primary latches and four primary taps. Two of the four CS primary latches are driven by complementary in-phase quarter-rate clocks and the other two of the four CS primary latches are driven by complementary quadrature quarter-rate clocks. No element of the DFE is driven by any half-rate clocks. In some implementations, each of the primary latches including a respective differential pair of n-channel output transistors and each primary tap includes a respective differential pair of p-channel input transistors connected via their gate nodes to a respective one of the four CS primary latches. In other implementations, each of the primary latches including a respective differential pair of p-channel input transistors and each primary tap includes a respective differential pair of n-channel output transistors connected via their gate nodes to a respective one of the four CS primary latches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.