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US 2003/0171107 A1Published application
Differential frequency down-conversion using techniques of universal frequency translation technology
AssigneeParkerVision, Inc.
InventorsDavid F. Sorrells, Michael J. Bultman, Robert W. Cook, Richard C. Looke, Charley D. Moses JR., Gregory S. Rawlins, Michael W. Rawlins
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Abstract
Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal, and applications thereof are described herein. Reducing or eliminating DC offset voltages and re-radiation generated when down-converting an electromagnetic (EM) signal is also described herein. Down-converting a signal and improving receiver dynamic range is also described herein.
Claims1
An apparatus for down-converting an electromagnetic signal and reducing DC offset voltages and re-radiation, comprising:
- a first UFD module that receives an input signal, wherein said first UFD module down-converts said input signal according to a first control signal and outputs a first down-converted signal;
- a second UFD module that receives said input signal, wherein said second UFD module down-converts said input signal according to a second control signal and outputs a second down-converted signal;
- and
- a first subtractor module that subtracts said second down-converted signal from said first down-converted signal and outputs a first channel down-converted signal.
1 more element
Dependencies are inferred from the claim text.