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:
Jan. 21, 1992
Filed:
Jun. 26, 1990
Osamu Tagiri, Atsugi, JP;
Anritsu Corporation, Tokyo, JP;
Abstract
A signal detector includes a signal input section, a detector, and a converter. The signal input section inputs a high frequency signal to be measured. The detector detects the high frequency signal to be measured input by the signal input section. The converter amplifies the output from the detector and includes a variable gain preamplifier which has a first gain higher than a linear gain when the detecting output is smaller than a predetermined value and a second gain lower than the linear gain when the detecting output is larger than the predetermined value. A cable line transmits an output from the variable gain preamplifier of the converter of the signal detector. A measuring equipment body includes a decoder and an analyzer. The decoder amplifies an output from the variable gain preamplifier transmitted by the cable line and includes a variable gain main amplifier which has a first gain lower than a linear gain when an output from the variable gain preamplifier is smaller than a predetermined value and a second gain higher than a linear gain when the output from the variable gain preamplifier is larger than the predetermined value. The analyzer performs predetermined signal analysis for an output amplified by the variable gain main amplifier of the decoder.