Polyphase harmonic rejection mixer
First Claim
1. A polyphase harmonic rejection mixer, comprising:
- a plurality of stages following each other, the plurality of stages including;
a first stage configured and arranged to perform at least frequency conversion; and
a second stage configured and arranged to perform at least selective weighting and combining;
wherein at least two of the plurality of stages are configured and arranged to perform at least combining; and
further comprising at least one further stage, each said further stage being configured and arranged to perform selective weighting and combining
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Accused Products
Abstract
A polyphase harmonic rejection mixer, comprising a plurality of stages following each other; wherein a first stage is arranged to perform at least frequency conversion; and a second stage is arranged to perform at least selective weighting and combining; wherein at least two of the plurality of stages are arranged to perform at least combining. In an embodiment, the first stage (28) comprises three single-ended gain blocks (10, 12, 14), arranged to perform selective weighting, frequency conversion and combining; and a second stage (30) following the first stage (28) and arranged to perform selective weighting and combining. The second stage (30) may reduce the number of phases output by the first stage (28) and may output (32) a complex differential down converted signal. The mixer may be directly interfaced to an antenna of an LNA-less receiver without weighting in the first stage. The mixer may be included in a software-defined radio.
15 Citations
16 Claims
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1. A polyphase harmonic rejection mixer, comprising:
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a plurality of stages following each other, the plurality of stages including; a first stage configured and arranged to perform at least frequency conversion; and a second stage configured and arranged to perform at least selective weighting and combining; wherein at least two of the plurality of stages are configured and arranged to perform at least combining; and further comprising at least one further stage, each said further stage being configured and arranged to perform selective weighting and combining - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of configuring a polyphase harmonic rejection mixer, the method comprising:
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using a first stage of a plurality of stages, performing at least frequency conversion; using a second stage of the plurality of stages, performing at least selective weighting and combining; perform at least combining using at least two stages of the plurality of stages; and using at least one further stage of the plurality of stages, performing selective weighting and combining. - View Dependent Claims (13)
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14. A polyphase harmonic rejection mixer, comprising a plurality of stages arranged in a pipeline and including:
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a first stage configured and arranged to perform down conversion of an radio frequency (RF) signal to provide a first plurality of intermediate frequency (IF) signals having equidistant phases, the first plurality including a number (X) of IF signals; a second stage coupled to an output of the first stage and configured and arranged to perform selective weighting of the first plurality of IF signals, and perform combining of the first plurality of IF signals to provide a second plurality of IF signals, the second plurality including a number (Y) of IF signals, where Y<
X; anda third stage coupled to an output of the second stage and configured and arranged to perform selective weighting of the second plurality of IF signals, and perform combining of the second plurality of IF signals to provide a third plurality of IF signals, the third plurality including a number (Z) of IF signals, where Z<
Y. - View Dependent Claims (15, 16)
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Specification