Noise reduction in a dual radio frequency receiver
US8200181B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2008 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Oct 26, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/0057
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a dual radio frequency (RF) receiver circuit that includes a first RF mixer and a second RF mixer. The first and second RF mixers may be fed from a common local oscillator or from two separate local oscillators. When fed from two separate local oscillators and when the first and second RF mixers are receiving the same or nearly the same RF channel, the frequency of the RF channel is less than the frequency of one local oscillator and is greater than the frequency of the other local oscillator. This arrangement separates the frequencies of the local oscillators, thereby reducing noise, instability, or both, which may otherwise de-sensitize the dual RF receiver circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.