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:
Apr. 19, 1983
Filed:
Aug. 22, 1980
Yoshiaki Tanaka, Tokyo, JP;
Mamoru Inami, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A signal spectrum display apparatus comprises a plurality of band-pass filters respectively having filtering bands of different center frequencies and operating to filter an input signal thereby to band-divide the input signal fed through an input terminal a plurality of rectification and charging circuits connected respectively to said band-pass filters, a display section having displaying systems of the same number as the band-pass filters respectively corresponding to the band-pass filters and for displaying the outputs of the rectification and charging circuits, and a switch connected between a point between the rectification and charging circuit and the display section, and the ground. A capacitor of the rectification and charging circuit charges and discharges during said switch is closed, whereby the input signal level is displayed in real-time in the display section, and stops charging and discharging during the switch is opened, whereby the maximum input signal level is successively displayed in the display section in response to the output voltage held in response to successive higher input signal voltage.