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:
Oct. 19, 1993
Filed:
Oct. 07, 1992
Applicant:
Inventors:
Robert E Miller, Prospect, KY (US);
Tam Nolan, Louisville, KY (US);
Assignee:
Blue Grass Electronics, Inc., Louisville, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310319 ; 34082571 ; 34082576 ;
Abstract
The present invention relates to an activation circuit for a battery-operated security alarm detection system where current drain and, therefore, battery life is of concern. It employs a non-current drawing piezo element which only sees part of the frequency band of interest to briefly activate or wake up a current-drawing electret microphone which has a bandwidth broad enough to sees the entire audio band of interest.