Tunable filters, cancellers, and duplexers based on passive mixers
US9800278B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 6, 2016 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Sep 6, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0074
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Tunable filters, cancellers, and duplexers based on passive mixers. A tunable delay cell includes passive mixers electrically coupled together for receiving an input signal and outputting a delayed signal, each passive mixer comprising a plurality of mixer switches. The tunable delay includes a control circuit for providing, to each passive mixer, a respective plurality of local oscillator (LO) signals, one to each mixer switch of each passive mixer. The control circuit is configured to vary the LO signals to cause a target frequency band of the input signal to be delayed by a target delay time in propagating through the passive mixers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.