High frequency amplification circuit, high frequency front-end circuit, and communication device
US10848110B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 2019 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Apr 24, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/7209
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high frequency amplification circuit includes transmission amplification circuits 11 and 12; a transmission filter D-Tx whose pass band is a band D of a first frequency band group; transmission filters E-Tx and G-Tx whose pass bands are respectively bands E and G of a second frequency band group; an output matching circuit 31 configured to match the transmission amplification circuit 11 and the transmission filter D-Tx; and an output matching circuit 32 configured to match the transmission amplification circuit 12 and the transmission filters E-Tx and G-Tx. The band D is positioned at a high frequency-side end portion of the first frequency band group, and the band E is positioned at a low frequency-side end portion of the second frequency band group. The output matching circuit 31 includes a low-pass circuit, and the output matching circuit 32 includes an impedance-variable circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.