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:
Nov. 19, 2002
Filed:
Jul. 30, 1999
Akira Nara, Tokyo, JP;
Sony/Tektronix Corporation, Tokyo, JP;
Abstract
This invention relates to a real time signal analyzer that can produce time domain data and frequency domain data at the substantial same time and in real time, securing the simultaneousness between them, and can analyze them with changing the setting of the center frequency and the signal analysis span arbitrarily in low cost configuration. The apparatus has frequency conversion means and for shifting the frequency of input time domain data according to a selectable center frequency data and for decimating them according to a selectable decimation coefficient, a FFT processor for FFT processing the output data of the frequency conversion means in real time, a delay means for delaying the output data of the frequency conversion means for a predetermined time, a frequency domain data memory means for storing the FFT processed frequency domain data from the FFT processor, a time domain data memory means for storing the delayed time domain data read out from the delay means, and feedback means and for feeding the data read out from the time domain data memory means back to the frequency conversion means instead of the input time domain data.