Spectrum converter for analog signals

Details Spectrum converter for analog signals Spectrum converter for analog signals

H - Electricity

04

L

354/106

H04L 25/49 (2006.01)

Patent

CA 1145051

PHN. 9435 12 ABSTRACT: A device for receiving analog and discrete input signals and for converting the spectrum thereof without loss of information. The resultant signal has a frequency response curve which exhibits zero points at the frequency zero and at half the sample frequency. The second zero point is then suitable for addition of a pilot tone, without the required bandwidth being increased and without interference with the data signal. The device comprises two integrating feedback activated. the output signals of which are alternately activated. The sign of the active output signal determines the sign of the input signal of the feedback loops and of the output signal of the device. One feedback loop directly receives said output signal, while the other feedback loop receives this output signal via a multiplier which alternately receives a positive and a negative multipli- cand.

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