Sub-harmonic image mitigation in digital-to-analog...

Details Sub-harmonic image mitigation in digital-to-analog... Sub-harmonic image mitigation in digital-to-analog...

2007-03-27

2008-11-11

Young, Brian (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S144000

Reexamination Certificate

active

07450044

ABSTRACT:
A digital-to-analog conversion system comprises a digital input, a digital-to-analog converter and a modified digital signal generator. The digital-to-analog converter has a conversion frequency and is subject to a periodic error having a periodicity equal to that of an N-th sub-harmonic of the conversion frequency, where N is an integer. The digital input is operable to receive a digital input signal. The modified digital signal generator is interposed between the digital input and the digital-to-analog converter and is operable in response to the digital input signal to generate a modified digital signal. The modified digital signal comprises a dynamic digital mitigation component that mitigates the periodic error of the digital-to-analog converter.

REFERENCES:
patent: 7061412 (2006-06-01), Wang et al.
patent: 7324798 (2008-01-01), Seo et al.
patent: 2004/0212525 (2004-10-01), Mallinson
patent: 2006/0022857 (2006-02-01), Chen

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