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:
May. 20, 1986
Filed:
Sep. 19, 1983
Applicant:
Inventor:
Tho T Vu, Fridley, MN (US);
Assignee:
Honeywell Inc., Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03K / ; H03K / ;
U.S. Cl.
CPC ...
307446 ; 307454 ; 307458 ; 307291 ; 307460 ;
Abstract
A bipolar OR logic circuit includes input diodes directly connected to a switching transistor. A first current source is coupled to the transistor's emitter and a load is directly connected to and between the collector and a voltage reference point. A second current source, connected to the transistor's base, sets the switching point of the transistor. The output is taken at the collector. A second bipolar transistor can be cross coupled to the first transistor to provide a voltage reference for the base of the first transistor and/or shift the logic level by taking the output at the emitter of the second transistor.