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:
Jan. 05, 1988
Filed:
Apr. 07, 1986
Applicant:
Inventors:
William F Davis, Tempe, AZ (US);
David M Susak, Mesa, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330307 ; 307310 ; 330256 ; 357 28 ;
Abstract
A quad operational amplifier integrated circuit is constructed such that each of the four cells forms a linear array. Devices which must be critically matched in each cell are symmetrically disposed with respect to the power devices of each cell about the same axis of symmetry. In this manner, critical devices will always reside on isothermal contours. To further enhance matching of critical devices, the axis of symmetry may be chosen to be colinear with stress axis of the semiconductor die in which the quad-operational amplifier implemented.