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:
Sep. 09, 1986
Filed:
Apr. 23, 1984
Applicant:
Inventor:
Tsutomu Ishihara, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ; H01C / ;
U.S. Cl.
CPC ...
307308 ; 307491 ; 307310 ;
Abstract
An electronic circuit uses a two input operational amplifier for converting a pressure into an electrical signal. The bias potentials at the two inputs are equal to each other in the absence of pressure. The bias potential is applied to one input via a pressure sensitive resistor comprising a semiconductor diaphram with a resistance diffused thereon. When pressure appears, the resistance changes and there is a difference of potential at the two inputs, which is processed into the electrical signal.
Ishihara, Tsutomu. (1986). Signal conversion circuit (U.S. Patent No. 4611129). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4611129
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile