Watch-crystal-based RF transmitter
US10097283B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2016 |
| Grant date | Oct 9, 2018 |
| Priority date | — |
| Expiry date | Nov 30, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/127
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Example radio frequency (RF) transmitters and associated methods are disclosed. One example RF transmitter includes an RF oscillator, a real-time clock (RTC) oscillator. and a control circuit. The control circuit is configured to determine whether a calibration of the RF oscillator is needed; electrically couple the RF oscillator to the RTC oscillator and initiate calibrating of the RF oscillator using the RTC oscillator when it is determined that the calibration is needed; and activate the RF oscillator to operate in an open-loop mode to generate an RF signal for data transmission. The calibration can be performed in a closed-loop mode before the data transmission or in an open-loop mode during the data transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.