Cancellation circuit using digital to time converter
US12425056B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2023 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Apr 2, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2215/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A cancellation circuit includes a limiter connected to an output of a first transmitter power amplifier that converts in input sinewave to a digital square wave and a digital to time converter (DTC) connected to the limiter. A RF digital to RF converter is connected to the DTC that converts the digital square wave input into an analog RF output. A cancellation amplifier with an input receives an output from the RF digital to RF converter and has an output connected to an output of a second transmitter power amplifier. The cancellation amplifier produces a cancellation signal to cancel an interference signal at the output of the second transmitter power amplifier from the output of the first transmitter power amplifier. A power detector is connected to the output of the second power amplifier that produces a power value detected at the output of the second power amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.