Drain sharing split LNA
US11476813B2 · kind B2 · utility
3Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2019 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Mar 16, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/16
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A receiver front end (300) having low noise amplifiers (LNAs) is disclosed herein. A cascode having a “common source” configured input FET and a “common gate” configured output FET can be turned on or off using the gate of the output FET. A first switch (235) is provided that allows a connection to be either established or broken between the source terminal of the input FET of each LNA. A drain switch (260) is provided between the drain terminals of input FETs to place the input FETs in parallel. This increases the gm of the input stage of the amplifier, thus improving the noise figure of the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.