Apparatus and methods for calibrating radio frequency transmitters to compensate for common mode local oscillator leakage
US11012104B2 · kind B2 · utility
1Cited by
21References
20Claims
0Family size
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Key dates
| Filing date | Apr 4, 2017 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Sep 16, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/009
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Apparatus and methods for calibrating radio frequency transmitters to compensate for common mode local oscillator leakage are provided herein. In certain configurations herein, a transmitter generates a radio frequency transmit signal based on mixing a baseband input signal with a local oscillator signal. The transmitter is calibrated to compensate for common mode local oscillator leakage. Thus, a common mode component of the local oscillator signal is reduced or eliminated from the radio frequency transmit signal, which provides a number of benefits, including lower levels of undesired emissions from the transmitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.