Supply modulator including switched-mode power supplier and transmitting device including the same
US9843260B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2017 |
| Grant date | Dec 12, 2017 |
| Priority date | — |
| Expiry date | Jan 6, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A supply modulator including a first switched-mode power supplier configured to transmit a modulated voltage to an output node in response to an envelope signal, the first switched mode power supplier including: a switching circuit configured to transmit a pulse signal in response to the amplitude of the envelope signal; and a low pass filter configured to generate the modulated voltage by filtering certain frequency band of the pulse signal, the low pass filter comprising a plurality of stages; and a second switched-mode power supplier configured to selectively transmit a compensation current to the output node in response to the current transmitted from the first switched-mode power supplier, wherein each of the plurality of stages of the low pass filter comprises at least one variable impedances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.