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US 2024/0396562 A1Published application
System for and method of digital to analog conversion frequency distortion compensation
AssigneeAvago Technologies International Sales Pte. Limited
InventorsJohn Szeming Wang, Kadir Dinc
Life of this patent
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Abstract
The systems and methods discussed herein related to digital to analog conversion. A digital to analog conversion a compensation circuit and a digital to analog conversion circuit. The compensation circuit includes a filter configured to provide roll off compensation in a baseband frequency using first coefficients. The compensation circuit is configured to convert the first digital signal to a second digital signal so that the second digital signal can be filtered by the filter using the first coefficients.
Claims20
An apparatus, comprising:
- a filter configured to provide roll off compensation in a baseband frequency using first coefficients, wherein a first digital signal is converted to a second digital signal so that the second digital signal can be filtered by the filter using the first coefficients;
- and
- a digital to analog conversion circuit comprising a digital input configured to receive a filtered signal from the filter or a first version of the filtered signal and provide an analog signal at an analog output.
A method comprising:
- upsampling and rotating digital signals having first-type values and second-type values to provide digital signals in a first domain;
- filtering the digital signals in the first domain to provide distortion compensated signals;
- derotating the distortion compensated signals;
- and
- converting the distortion compensated signals to analog signals.
2 more elements
A transmitter, comprising:
- a rotator;
- a filter;
- a derotator, wherein the rotator is configured to receive a first-type digital signal and a second-type signal and provide a first rotated signal and a second rotated signal, wherein the filter is configured to receive the first rotated signal and the second rotated signal and provide a first filtered signal and a second filtered signal, the filter being configured to compensate for digital to analog conversion distortion, wherein the derotator is configured to receive the first filtered signal and the second filtered signal and provide a first derotated signal and a second derotated signal;
- a frequency converter configured to receive the first derotated signal and the second derotated signal and provide an up converted first-type signal and an up converted second-type signal;
- and
- a digital to analog converter configured to receive the up converted first-type signal and the up converted second-type signal and provide an analog signal at an analog output.
3 more elements
Dependencies are inferred from the claim text.