System and method of mitigating interference caused by coupling from power amplifier to voltage-controlled oscillator
US12431845B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2024 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Apr 18, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00019
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transmitter including a frequency synthesizer with a voltage-controlled oscillator that provides an oscillating signal, a programmable delay circuit that delays the oscillating signal to provide a delayed oscillating signal, a power amplifier that is configured to amplify the delayed oscillating signal for transmission sufficient to produce interference, and a delay controller that programs the delay circuit with a delay time that reduces interference caused by coupling from the power amplifier to the voltage-controlled oscillator. The delay circuit may be programmed to reduce control voltage change of the voltage-controlled oscillator as a function of delay change, and/or to reduce phase noise degradation at an output of the transmitter as a function of delay change. The delay may be adjusted based on detected operating temperature. A calibration value may be determined at a calibration frequency, in which a frequency offset may be determined based on a selected channel frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.