LNA with linearized gain over extended dynamic range
US8941441B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Jun 3, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G5/24
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low noise amplifier including a variable gain amplifier stage configured to accept an input signal and to provide a load driving signal; a tunable bandpass filter connected as a load to the variable gain amplifier stage, wherein the bandpass filter includes a cross-coupled transistor pair, and at least one cross-coupled compensation transistor pair biased in a subthreshold region configured to add a transconductance component when the load driving signal is of a magnitude large enough to decreases a transconductance of the cross-coupled transistor pair; and, a controller circuit configured to tune the bandpass filter. The filter can be tuned in respect to the frequency and the quality factor Q.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.