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:
Jul. 25, 1978
Filed:
Apr. 06, 1977
Tilman Betz, Groebenzell, DE;
Rohde and Schwarz, , DE;
Abstract
In a sound level meter the output voltage of the microphone is fed to a voltage-frequency converter by way of an exponentially operating circuit, such as a squarer, and the output of the converter operates a binary counter having an indicator unit associated therewith. A gate circuit is controlled by a timing generator and is interposed between the voltage-frequency converter and the binary counter. The indicator unit includes a plurality of indicating elements which are connected at the outputs of the successive counter stages and each of the indicator elements is associated with a particular indicia carried on a dB scale. With a squarer as the exponential circuit the dB scale has a 3 dB incrementation for the respective indicator elements.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile