EP 0902895 A1 19990324 - INTERFEROMETRIC SIGNAL PROCESSING APPARATUS
Title (en)
INTERFEROMETRIC SIGNAL PROCESSING APPARATUS
Title (de)
INTERFEROMETRISCHE SIGNALVERARBEITUNGSVORRICHTUNG
Title (fr)
APPAREIL DE TRAITEMENT INTERFEROMETRIQUE DU SIGNAL
Publication
Application
Priority
- AU 9700345 W 19970530
- AU PO024296 A 19960531
Abstract (en)
[origin: WO9746890A1] An interferometric signal processing apparatus (10) producing an output signal from a first input signal (34) and a second input signal (34), said input signals (34) having substantially equal carrier frequencies, comprising: a bridge (12) having a first arm (26) and a second arm (28), each arm having a first end (30) and a second end (32), the first and second input signals (34) being input to the first end (30) of the first and second arms (26, 28), respectively; a device-under-test (36) provided the first arm (26); a carrier suppression means (14) connected to the second ends (32) of the first and second arms (26, 28) to produce a carrier-suppressed signal at its output (A); an amplifier (16) arranged to amplify said carrier-suppressed signal; and a mixing means (22, 24) responsive to the amplified carrier-suppressed signal and a carrier-dominated signal to produce the output signal; wherein the differential group delay between: the first end (30) of the first arm (26) and the output (A) of the carrier suppression means (14); and the first end (30) of the second arm (28) and the output (A) of the carrier suppression means (14) is less than or equal to 1000/fo seconds, where fo is the time-averaged mean value of the carrier frequencies of the input signals (34).
IPC 1-7
IPC 8 full level
G01B 9/02 (2006.01); G01R 27/28 (2006.01); H03D 9/04 (2006.01)
CPC (source: EP)
G01R 27/28 (2013.01); H03D 9/04 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9746890 A1 19971211; AU 2944297 A 19980105; AU 736234 B2 20010726; AU PO024296 A0 19960627; CA 2256717 A1 19971211; EP 0902895 A1 19990324; EP 0902895 A4 20000816; JP 2000512010 A 20000912
DOCDB simple family (application)
AU 9700345 W 19970530; AU 2944297 A 19970530; AU PO024296 A 19960531; CA 2256717 A 19970530; EP 97923665 A 19970530; JP 50001298 A 19970530