Equivalent radio frequency notch filter, radio frequency chip, and receiver
US8385873B2 · kind B2 · utility
2Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 2011 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Sep 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D7/1458
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An equivalent radio frequency (RF) notch filter, an RF chip, and a receiver are provided. The equivalent RF notch filter includes: a local oscillation (LO) circuit, configured to provide a LO frequency signal; configured to be connected in parallel with the main chain, and down-convert signals of the main chain; and a frequency selective circuit realized by impedance difference, configured to provide different impedances for down-converted signals with different frequencies from the mixing circuit, so as to absorb the signals that need to be suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.