EP 2172817 B1 20121212 - Detection of variations of a time delay between optical or electric signals
Title (en)
Detection of variations of a time delay between optical or electric signals
Title (de)
Detektion von Veränderungen eines Zeitabstands optischer oder elektrischer Signale
Title (fr)
Détection des variations d'un intervalle de temps entre des signaux optiques ou électriques
Publication
Application
Priority
DE 102008045359 A 20080822
Abstract (en)
[origin: EP2172817A2] The method involves modulating light signal (1) or light reference signal (3) based on electrical or electrical reference signals respectively. The light signal and light reference signal are received by a photodetector (5). The electrical response signal (15) having frequency spectrum depending on interval of time is outputted at an output (13) of photodetector. The harmonic is filtered from the frequency spectrum of electrical response signal for detecting changes in the interval of time. An independent claim is included for apparatus for detecting change in interval of time between electrical signal and electrical reference signal.
IPC 8 full level
G04F 10/00 (2006.01); G04G 7/00 (2006.01)
CPC (source: EP US)
G04F 10/00 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
EP 2172817 A2 20100407; EP 2172817 A3 20110302; EP 2172817 B1 20121212; DE 102008045359 B3 20100520; JP 2010066255 A 20100325; JP 5543742 B2 20140709; SI 2172817 T1 20130430; US 2010098408 A1 20100422; US 8242767 B2 20120814
DOCDB simple family (application)
EP 09010549 A 20090817; DE 102008045359 A 20080822; JP 2009191731 A 20090821; SI 200930532 T 20090817; US 54569609 A 20090821