Programmable RF notch filter for envelope tracking
US9020451B2 · kind B2 · utility
94Cited by
141References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 26, 2013 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Jul 26, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2007/013
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A parallel amplifier, a switching supply, and a radio frequency (RF) notch filter are disclosed. The parallel amplifier has a parallel amplifier output, such that the switching supply is coupled to the parallel amplifier output. Further, the RF notch filter is coupled between the parallel amplifier output and a ground. The RF notch filter has a selectable notch frequency, which is based on an RF duplex frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.