Low IF receiver
US6707858B1 · kind B1 · utility
14Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1999 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Aug 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A low IF receiver frequency translates an input signal in quadrature related mixers, filters in respective low pass channel filters, and derotates to produce a wanted signal and its image. At switch-on, the receiver is operated as a zero IF receiver in order to determine which of the adjacent channels to the wanted channel has the smaller interferer, and the local oscillator frequency supplied to the mixers is then adjusted to bring that interferer into the channel bandwidth of the low pass channel filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.