Bias circuit for supplying a bias current to an RF power amplifier
US10965264B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | May 3, 2019 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Jul 4, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A bias circuit generates a bias current to an RF power amplifier used for transmitting RF signals, and the amount of the bias current supplied to the RF power amplifier can be configured in multiple modes through transistor switches that are controlled by mode control signals, so that the bias current supplied to the RF power amplifier can be adjusted according to the required power level of the transmitting RF signals. In addition, the bias current can be turned off by another transistor switch that is controlled by a power control signal for saving power while the RF power amplifier is not transmitting RF signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.