Reduced bandwidth envelope tracking
US9595981B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 2015 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Aug 26, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0416
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Envelope power supply circuitry includes an envelope power converter circuitry and envelope tracking circuitry. The envelope power converter circuitry receives an envelope power converter control signal from the envelope tracking circuitry and a supply voltage and provides an envelope power supply signal for an amplifier based thereon. In a first mode of operation, the envelope power converter control signal is provided such that the envelope power supply signal causes the gain of the amplifier to remain substantially constant over a range of input power provided to the amplifier. In a second mode of operation, the envelope power converter control signal is provided such that the envelope power supply signal remains substantially constant for values within the range of input power below a predetermined threshold, and such that the envelope power supply signal causes the gain of the amplifier to remain substantially constant for other values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.