Tuned continuous time delay FIR equalizer
US7075363B1 · kind B1 · utility
7Cited by
16References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 7, 2003 |
| Grant date | Jul 11, 2006 |
| Priority date | — |
| Expiry date | Jul 7, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03477
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An analog finite impulse response (“FIR”) filter generates a continuous time output using a chain of tunable delay elements. The tunable delay elements generate a time delay in an input signal. A calibration circuit, consisting of a control loop, tunes the delay elements to provide precision in the time delay response of the delay elements. The control loop generates a delay adjustment, based on the period of reference signals, and the phase adjustment is used to tune the parameters of the delay elements. The tunable delay elements may comprise any combination of transmission lines, lumped elements and semi-lumped elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.