Communication system and control circuit therein
US8903018B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 2012 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Jan 26, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/13
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication system includes a baseband processor, an RF (Radio Frequency) transceiver, a power amplifier, an antenna, and a control circuit. The power amplifier generates an amplified signal. The control circuit includes a coupler, an AC-to-DC (Alternating Current to Direct Current) converter, a comparator, and an attenuator. The coupler generates a transmission signal and a coupling signal according to the amplified signal. The AC-to-DC converter is coupled to the coupler, and converts the coupling signal into a DC (Direct Current) signal. The comparator compares a DC voltage of the DC signal with a reference voltage so as to generate a control signal. The attenuator is coupled between the coupler and the antenna, and attenuates or does not attenuate the transmission signal according to the control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.