Line receiver with improved dynamic range
US6754288B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 2000 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Jun 30, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2647
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A receiver which may be an xDSL receiver has improved dynamic range. The receiver has a first amplifier, a network of four impedances and a variable gain second amplifier. The variable gain second amplifier has an input connected to an ouput of the first amplifier, an output connected to the first amplifier, and a variable gain control input. The gain of the variable gain second amplifier is and the pass-band gain of the receiver is K. By controlling the gain of the receiver with an AGC (automatic gain control), the receiver can amplify and filter inputs over a wide dynamic range with lower distortion and without saturation. Alternatively, the gain of the variable gain second amplifier is The four impedances can be arranged to realise low-pass or high-pass filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.