Invention Grant
- Patent Title: Digital downconverter with digital oscillator frequency error correction
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Application No.: US15949294Application Date: 2018-04-10
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Publication No.: US10574246B2Publication Date: 2020-02-25
- Inventor: Sarma Sundareswara Gunturi , Sundarrajan Rangachari , Aswath Vs , Raunak Dhaniwala
- Applicant: TEXAS INSTRUMENTS INCORPORATED
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent John R. Pessetto; Charles A. Brill; Frank D. Cimino
- Main IPC: H03L7/24
- IPC: H03L7/24 ; H03K21/38 ; H03L7/02

Abstract:
A digital local oscillator includes a look-up table and oscillator control circuitry. The look-up table contains samples of the digital local oscillator signal. The oscillator control circuitry is configured to select samples from the look-up table based on an accumulated phase value. The oscillator control circuitry is also configured to add a correction value to the accumulated phase value based on a difference of a frequency of the digital local oscillator signal and a desired frequency.
Public/Granted literature
- US20190207612A1 DIGITAL DOWNCONVERTER WITH DIGITAL OSCILLATOR FREQUENCY ERROR CORRECTION Public/Granted day:2019-07-04
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