The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 2004
Filed:
Nov. 05, 2001
Eugene Nikolay Ivanov, Wembley Downs, AU;
Richard Alec Woode, Shenton Park, AU;
Michael Edmund Tobar, Duncraig, AU;
Other;
Abstract
An interferometric signal processing apparatus ( ) producing an output signal from a first input signal ( ) and a second input signal ( ), the input signals ( ) having substantially equal carrier frequencies, comprising a bridge ( ) having a first arm ( ) and a second arm ( ), each arm having a first end ( ) and a second end ( ), the first and second input signals ( ) being input to the first end ( ) of the first and second arms ( ), respectively; a device-under-test ( ) provided the first arm ( ); a carrier suppressor ( ) connected to the second ends ( ) of the first and second arms ( ) to produce a carrier-suppressed signal at its output (A); an amplifier ( ) arranged to amplify said carrier-suppressed signal; and a mixer ( ) 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 ( ) of the first arm ( ) and the output (A) of the carrier suppressor ( ); and the first end ( ) of the second arm ( ) and the output (A) of the carrier suppressor ( ) is less than or equal to 1000/f seconds, where f is the time-averaged mean value of the carrier frequencies of the input signals ( ).