Cartesian loop circuits, transmitters, devices, and related methods
US10305518B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2017 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Dec 15, 2037 |
Classification
- Technology area (CPC —)General
Abstract
A Cartesian loop circuit includes a reference signal amplifier, a forward path coupled to the reference signal amplifier, a feedback path coupled to the forward path, and a controller. The forward path includes an up-mixer to up mix a forward path signal to a radio frequency signal. The feedback path includes a down-mixer to down mix a feedback signal to a frequency of a baseband reference signal inputted to the forward path. The feedback path provides the down-mixed feedback signal to the forward path. The controller is to perform power control at a low power by controlling a gain of the reference signal amplifier and is to perform power control at a high power by controlling a gain of the down-mixer. At the high power, the controller may perform power control by further controlling the gain of the up-mixer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.