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:
Mar. 19, 2002
Filed:
Oct. 26, 1998
Michiaki Arai, Tokyo, JP;
Takashi Kosuge, Tokyo, JP;
Advantest Corporation, Tokyo, JP;
Abstract
A method for automatically setting a reference level is provided. A frequency-converted output of frequency converter is branched and the branched output is further frequency-converted by another frequency converter The thus frequency-converted signal is converted to a digital signal by an AD converter and the digital signal is once stored in a memory The digital data is read out from the memory and a check is made to see if the AD converter was overflown. If the AD converter was overflown, an attenuation amount of a first stage attenuator is increased from an initially set value to acquire a data again. If the AD converter was not overflown, a check is made to see if a peak value of the digital data is within a range of 85%-65% of the full scale of the AD converter If a peak value of the digital data is not within the range of 85%-65% of the full scale, a calculation is performed to increase/decrease the gain of an amplifier If a peak value is within the range, this value is set as a reference level.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile