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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.:

US 4604640 B1

PDFFull Text
Date of Patent:
Aug. 05, 1986

Filed:

Oct. 01, 1984

Darlington transistors

Applicant:
Inventors:

Derek Colman, Bromham, GB;

David R Cotton, Putnoe, GB;

Assignee:

Texas Instruments Incorporated, Dallas, TX (US);

Attorneys:

Sharp; Mel

Merrett; N. Rhys

Honeycutt; Gary C.

Primary Examiner:

Martin H Edlow

Assistant Examiner:

Terri M Henn

Int. Cl.
CPC ...
H01L / ; H01L / ; H03K / ;
U.S. Cl.
CPC ...
357 46 ; 357 48 ; 307315 ;
Abstract

In a darlington transistor having an integrated resistor connected from base to emitter of the output transistor element, the effect of the diode between collector and emitter formed when the resistor consists of an extension to the base region is reduced by forming at least part of the resistor either as an extension to the emitter region or as a separate region of the same conductivity type and connected to it. The resistor formed by the emitter region material appears in series with the diode.

Find Patent Forward Citations

Colman, Derek. (1986). Darlington transistors (U.S. Patent No. 4604640). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4604640

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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