Digital proportional integral loop filter

Details Digital proportional integral loop filter Digital proportional integral loop filter

2011-06-14

2011-06-14

Nguyen, Hai L (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

Reexamination Certificate

active

07961038

ABSTRACT:
A digital proportional integral loop filter is provided. A first proportional amplification unit multiplies a phase error value by a first proportional loop gain, and a first integral amplification unit multiplies a phase error accumulation value by a first integral loop gain. A second proportional amplification unit multiplies the phase error value by a second proportional loop gain, and a second integral amplification unit multiplies the phase error accumulation value by a second integral loop gain. A first offset value generation unit generates a first offset value by subtracting the second proportional loop gain from the first proportional loop gain and multiplying a resulting value by a phase error average value, and a second offset value generation unit generates a second offset value by subtracting the second integral loop gain from the first integral loop gain and multiplying a resulting value by a phase error accumulation average value.

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Ioannis L. Syllaios et al., “On the Reconfigurability of All-Digital Phase-Locked Loops for Software Defined Radios,” The 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communication (PIMRC'07), Sep. 2007.

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