Invention Grant
- Patent Title: Accurate sign change for radio frequency transmitters
-
Application No.: US17734801Application Date: 2022-05-02
-
Publication No.: US11949769B2Publication Date: 2024-04-02
- Inventor: Voravit Vorapipat , Morteza Nick , Krishna Chaitanya Reddy Gangavaram , Antonio Passamani
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: FLETCHER YODER PC
- Main IPC: H04L7/00
- IPC: H04L7/00 ; H04L27/04 ; H04L27/36

Abstract:
Embodiments disclosed herein relate to improving a power output of a transmitter of an electronic device. To do so, the transmitter may include signal selection circuitry to adjust a sign selection signal to accurately transition between polarities of a quadrature (e.g., I or Q) component signal stored in or for which an indication is stored in a storage cell of a radio frequency digital-to-analog converter. The sign selection signal may generate a separate adjusted sign selection signal for each polarity of each quadrature component signal such that a transition of the selection signal between a first value and a second value (e.g., logic high and low) occurs when the respective quadrature (e.g., +/− and I/Q) component signal is a logic low. In this way, the signal selection circuitry reduces an error pulse in the output of the transmitter.
Public/Granted literature
- US20220345288A1 ACCURATE SIGN CHANGE FOR RADIO FREQUENCY TRANSMITTERS Public/Granted day:2022-10-27
Information query