EP 1844544 A2 20071017 - DEMODULATOR AND MODULATOR/DEMODULATOR BY DIRECT FREQUENCY CONVERSION
Title (en)
DEMODULATOR AND MODULATOR/DEMODULATOR BY DIRECT FREQUENCY CONVERSION
Title (de)
DEMODULATOR UND MODULATOR/DEMODULATOR DURCH DIREKTFREQUENZUMSETZUNG
Title (fr)
DEMODULATEUR ET MODULATEUR-DEMODULATEUR PAR CONVERSION DIRECTE DE FREQUENCE
Publication
Application
Priority
- FR 2005002476 W 20051007
- FR 0410644 A 20041008
Abstract (en)
[origin: WO2006040453A2] The demodulator by direct frequency conversion comprises a vector addition device having: a first circuit (1) that furnishes, starting from a first AC signal (LO), a respective AC signal to n outputs that are not all of the same amplitude and of the same frequency, but are out of phase with regard to one another in such a manner that each one is not either in phase nor in opposite phase with any other; a second circuit (2) that splits a second AC signal (RFin) toward n outputs; a number n of summers (3a, 3b, 3c) each receiving, at the input, a respective output of the first circuit (1) and a respective output of the second circuit (2), and; a respective power sensor (4a, 4b, 4c) for each summer, whereby the number n is greater than or equal to 3. The demodulator also comprises digital processing means (5, 6) that furnish the result of the demodulation.
IPC 8 full level
H03D 9/04 (2006.01)
CPC (source: EP US)
H03D 7/125 (2013.01 - EP US); H04B 1/30 (2013.01 - EP US)
Citation (search report)
See references of WO 2006040453A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
FR 2876517 A1 20060414; FR 2876517 B1 20090410; EP 1844544 A2 20071017; US 2008064433 A1 20080313; US 7890081 B2 20110215; WO 2006040453 A2 20060420; WO 2006040453 A3 20070405
DOCDB simple family (application)
FR 0410644 A 20041008; EP 05809116 A 20051007; FR 2005002476 W 20051007; US 57684405 A 20051007