Radio frequency (RF) amplifier bias circuit
US11509269B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2020 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Jan 6, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier circuit includes an amplifier configured to receive a radio frequency (RF) input signal from an input node, a bias circuit comprising a reference transistor coupled between a reference current source and ground, and a bias transistor coupled to the reference transistor and configured to generate a main bias current to bias the amplifier, an input power sense circuit coupled to the input node, and an additional transistor coupled to the input power sense circuit and to the bias transistor, the additional transistor configured to generate an additional bias current to bias the amplifier, the additional bias current responsive to a power level of the RF input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.