Digitally controlled transmission line equalizer
US6240131A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1997 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Jun 30, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/1291
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A filter has a transfer function. The filter includes a signal input for receiving an input signal and a signal output operatively coupled to the signal input for providing an output signal. A ratio of the output signal to the input signal is equal to the filter's transfer function. The filter also includes a set of control inputs, wherein each control input in the set of control inputs is adapted for providing a digital signal. Each selectable transconductive load in a set of selectable transconductive loads has a transconductance and is operatively coupled to the signal output and a control input in the set of control inputs. The transfer function is set in response to a digital signal provided by at least one control signal in the set of control signals. Each selectable transconductive load is selected in response to at least one control signal in the set of control signals. Accordingly, the value for the transfer function is further dependent upon transconductances provided by selectable transconductive loads that are selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.