Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2006-07-25
2010-02-23
Phu, Phuong (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S298000, C375S373000, C375S355000, C332S149000, C455S108000, C455S109000
Reexamination Certificate
active
07668249
ABSTRACT:
The present invention includes a digital quadrature rate converter and an oversampling interpolator, which are used to receive digital quadrature modulation data at one clock rate and to provide oversampled digital quadrature modulation data at a higher clock rate. Rate conversion and oversampled interpolation are used to accommodate systems with multiple clock frequencies and to generate modulation signals with low distortion. Some embodiments of the present invention add timing control to the oversampled interpolation. Some embodiments of the present invention may combine the rate conversion, oversampled interpolation, and timing control operations into a single digital circuit.
REFERENCES:
patent: 6144712 (2000-11-01), Samueli et al.
patent: 6366177 (2002-04-01), McCune et al.
patent: 6377784 (2002-04-01), McCune
patent: 7010276 (2006-03-01), Sander et al.
patent: 7158494 (2007-01-01), Sander et al.
Phu Phuong
RF Micro Devices, Inc.
Withrow & Terranova, P.L.L.C.
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