发明名称 |
INTERFEROMETRIC SIGNAL PROCESSING APPARATUS |
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). |
申请公布号 |
WO9746890(A1) |
申请公布日期 |
1997.12.11 |
申请号 |
WO1997AU00345 |
申请日期 |
1997.05.30 |
申请人 |
POSEIDON SCIENTIFIC INSTRUMENTS PTY. LTD.;THE UNIVERSITY OF WESTERN AUSTRALIA;IVANOV, EUGENE NIKOLAY;WOODE, RICHARD, ALEC;TOBAR, MICHAEL, EDMUND |
发明人 |
IVANOV, EUGENE NIKOLAY;WOODE, RICHARD, ALEC;TOBAR, MICHAEL, EDMUND |
分类号 |
G01B9/02;G01R27/28;H03D9/04 |
主分类号 |
G01B9/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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