Adaptive equalizer
US6137832A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1998 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Jul 24, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45206
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods are described for adaptive equalizers. A circuit adapted to transform an equalizer input signal at a receiver to approximate an output signal at a transmitter includes an equalizer, a phase matching loop coupled to the equalizer, and an amplitude locking loop coupled to the equalizer. The equalizer can include a number of coarse band segments to provide coarse adjustment, at least one of which includes a number of fine band segments to provide fine adjustment. The systems and methods provide advantages in that multiple cable lengths can be serviced by a single equalizer, variations in the low frequency gain and the location of the zero point due to variations in manufacture and operating temperature are obviated, and a suitable gain can be provided at much higher frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.