Frequency translated filters for wideband applications
US8467760B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2009 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Jan 19, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H19/002
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Embodiments of a SAW-less RF receiver front-end that includes a frequency translated notch filter (FTNF) are presented. An FTNF includes a passive mixer and a baseband impedance. The baseband impedance includes capacitors that form a low-Q band-stop filter. The passive mixer is configured to translate the baseband impedance to a higher frequency. The translated baseband impedance forms a high-Q notch filter and is presented at the input of the FTNF. The FTNF can be fully integrated in CMOS IC technology (or others, e.g., Bipolar, BiCMOS, and SiGe) and applied in wireless receiver systems including EDGE/GSM, Wideband Code Division Multiple Access (WCDMA), Bluetooth, and wireless LANs (e.g., IEEE 802.11). In addition, embodiments of a generalized FTNF for wideband applications are presented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.