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:
Mar. 21, 1989
Filed:
Feb. 25, 1987
Applicant:
Inventor:
Shigeru Miyake, Suita, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03K / ; H03B / ;
U.S. Cl.
CPC ...
307303 ; 307242 ; 307304 ; 307482 ; 3311 / ;
Abstract
A trimmable semiconductor device includes a plurality of capacitors or resistors, each of which has a predetermined value, and a plurality of programmable switches each of which is operatively associated with the corresponding one of the plurality of capacitors or resistors. All of the capacitors or resistors and the programmable switches are fabricated internally and thus on the same chip or substrate. Thus, when the plurality of programmable switches are selectively programmed, the corresponding ones of the plurality of capacitors or resistors are selected and thus connected to a circuit formed on the substrate, thereby carrying out required adjustments electrically.