Radio frequency receiver circuit and the inductor-coupling single-ended input differential-output low-noise amplifier thereof
US9397714B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2015 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Sep 10, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45621
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention presents a RF receiver circuit including an inductor-coupling single-ended input differential-output LNA, a mixer circuit, and a differential trans-impedance amplifier. The inductor-coupling single-ended input differential-output LNA includes a single-ended input, a balance-to-unbalance transformer, and an inductor-less differential LNA. The balance-to-unbalance transformer is used to transform the radio frequency signals into a plurality of differential-output first differential signals and includes a first inductor and a second inductor. The inductor-less differential LNA is used to transform the first differential signals into a plurality of differential-output second differential signals, wherein the input impedance of the inductor-coupling single-ended input differential-output LNA is inversely proportional to the square of the coil ratio of the first and second inductor, and the product of the reciprocal of the coil ratio and the input impedance matches the external input impedance of the inductor-coupling single-ended input differential-output LNA.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.