On-chip harmonic filtering for radio frequency (RF) communications
US10951190B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2020 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Apr 13, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2210/025
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Systems and methods are disclosed for on-chip harmonic filtering for radio frequency (RF) communications. A filtering and matching circuit for an integrated circuit includes a first capacitance coupled in parallel with a first inductance, a second inductance coupled to the first inductance, and a variable second capacitance coupled between the first and second inductance. The variable second capacitance is controlled to provide filtering with respect to the RF signal as well as impedance matching with respect to a load coupled to the connection pad. For one embodiment, the variable second capacitance includes a coarse-tune variable capacitor circuit and a fine-tune variable capacitor circuit. The coarse-tuning controls impedance matching, and the fine tuning controls a notch for the filtering. The load can be an antenna for the RF communications. The integrated circuit can include a receive path, a transmit path, or both.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.