Variable equalizer
US4459698A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1982 |
| Grant date | Jul 10, 1984 |
| Priority date | — |
| Expiry date | Mar 15, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03019
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A small-sized LSI variable equalizer is provided for accurately equalizing waveforms of signals transmitted via transmission lines of different distances. Variable equalizer units capable of stepwise changing the equalizing characteristics thereof are connected in series with each other with the variable equalizer units having variable step widths different from each other. An output signal of the variable equalizer units is compared with a reference signal to convert the comparison output signal to a digital signal which includes an upper order bits and lower order bits, whereby one of the equalizer units which has a wide variable step width is controlled by the upper order bits and the other of the equalizer units which has a narrow variable step width is controlled by the lower order bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.