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. 20, 1978
Filed:
Mar. 28, 1977
Applicant:
Inventors:
James Alvin Davis, Glen Ellyn, IL (US);
William Jay Ooms, Schaumburg, IL (US);
Assignee:
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
307249 ; 307253 ; 307297 ; 3072 / ; 179 / ;
Abstract
A semiconductor transmission circuit arrangement which utilizes symmetrical transmission transistors and bias circuitry which exhibits a high output impedance and is arranged to maintain equal d.c. bias currents in the base and the emitter/collectors of the transmission transistor. A multiple collector transistor is utilized as a primary current source and a current mirror circuit is used as a control arrangement.