Transmitter with reduced VCO pulling
US11206030B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2020 |
| Grant date | Dec 21, 2021 |
| Priority date | — |
| Expiry date | Nov 27, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0408
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transmitter circuit includes a phase locked loop circuit, having one or more operational characteristics indicative of an operating state of the phase locked loop circuit. The phase locked loop circuit is configured to generate a frequency signal. The transmitter circuit also includes a power amplifier configured to selectively drive an antenna with a drive signal according to the frequency signal, and a programmable delay circuit configured to controllably extend a propagation delay between the frequency signal and the drive signal of the power amplifier. The programmable delay circuit is programmed such that a first value of a particular operational characteristic of the phase locked loop circuit is substantially equal to a second value of the operational characteristic of the phase locked loop circuit. The first value is measured with the power amplifier not driving the antenna. The second value is measured with the power amplifier driving the antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.