公开(公告)号：EP0760954A4

公开(公告)日：1999-11-10

申请号：EP95919278

申请日：1995-05-25

申请人： POSEIDON SCIENT INSTR PTY LTD ,  UNIV WESTERN AUSTRALIA

发明人： WOODE RICHARD ALEC ,  TOBAR MICHAEL EDMUND ,  IVANOV EUGENE NIKOLAY

IPC分类号： G01R29/26 ,  G01R31/28 ,  H03B1/04 ,  H03B5/18 ,  H03L7/00 ,  H04B15/00 ,  H03B1/00 ,  H03B5/30

CPC分类号： H03B5/18 ,  G01R29/26 ,  G01R31/2824 ,  H03B2202/027 ,  H03B2202/076

摘要： A phase noise detector for a signal having a carrier frequency, comprising a frequency discriminator producing a dispersed signal from the signal and a phase detector means (28) responsive to the carrier frequency in the signal and to a carrier suppressed signal to produce an output signal corresponding to the noise close to the carrier frequency in the signal, the carrier suppressed signal being produced by a carrier suppression means (30) responsive to two input signals, the input signals corresponding to the signal, one of the input signals being the dispersed signal.

公开(公告)号：EP0902895A4

公开(公告)日：2000-08-16

申请号：EP97923665

申请日：1997-05-30

申请人： POSEIDON SCIENT INSTR PTY LTD ,  UNIV WESTERN AUSTRALIA

发明人： IVANOV EUGENE NIKOLAY ,  WOODE RICHARD ALEC ,  TOBAR MICHAEL EDMUND

IPC分类号： G01B9/02 ,  G01R27/28 ,  H03D9/04 ,  G01R17/00

CPC分类号： H03D9/04 ,  G01R27/28

摘要： 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).