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:
Jun. 19, 1990
Filed:
Feb. 08, 1988
Applicant:
Inventors:
Assignee:
SGS-Thomson Microelectronics S. R. L., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 34 ; 357 40 ; 357 42 ; 357 51 ; 307246 ; 307254 ; 3072962 ; 307355 ; 307491 ; 330 85 ; 330307 ;
Abstract
A device for minimizing parasitic junction capacitances in an isolated collector vertical PNP transistor, having a terminal N connected to an epitaxial n layer, comprises a bootstrap circuit including an emitter follower vertical PNP transistor having its emitter and base respectively connected to the terminal of the epitaxial n layer and the collector of the isolated collector transistor; further, a bias resistance is connected between the emitter and one pole of a voltage supply to the emitter follower.