Envelope tracking supply modulators for multiple power amplifiers
US9614477B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2016 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Jan 29, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present disclosure is directed to an envelope tracking supply modulator for multiple PAs. The envelope tracking supply modulator is configured to provide, for each of the multiple PAs, a separate supply voltage that is modulated based on the envelope of the respective RF input signal to the PA. Each of the modulated supply voltages is constructed from a DC component and an alternating current (AC) component. The DC component for each modulated supply voltage is generated by a main switching regulator that is shared by the multiple PAs. In one embodiment, the AC component for each modulated supply voltage is generated by an auxiliary switching regulator that is shared by the multiple PAs and a separate linear regulator for each of the multiple PAs. In another embodiment, the AC component for each modulated supply voltage is generated by a separate buffer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.