- Patent Title: Cartesian loop circuits, transmitters, devices, and related methods
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Application No.: US15844081Application Date: 2017-12-15
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Publication No.: US10367535B2Publication Date: 2019-07-30
- Inventor: Nir Corse , Mark Rozental , Yaniv Salem
- Applicant: MOTOROLA SOLUTIONS, INC.
- Applicant Address: US IL Chicago
- Assignee: MOTOROLA SOLUTIONS, INC.
- Current Assignee: MOTOROLA SOLUTIONS, INC.
- Current Assignee Address: US IL Chicago
- Agency: Perry + Currier, Inc.
- Main IPC: H03F1/32
- IPC: H03F1/32 ; H03G3/30 ; H04B1/04

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.
Public/Granted literature
- US20190190549A1 CARTESIAN LOOP CIRCUITS, TRANSMITTERS, DEVICES, AND RELATED METHODS Public/Granted day:2019-06-20
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