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:
Dec. 27, 1977
Filed:
Aug. 02, 1976
Applicant:
Inventor:
Joseph B Wicklund, Jr, Bothell, WA (US);
Assignee:
Opcon, Inc., Everett, WA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330252 ; 330311 ;
Abstract
A balanced low impedance differential input line preamplifier comprising a differential amplifier and a pair of high gain common base input stages. The input signal is directly applied to the emitters of the common base input stages and the collectors of the common base input stages are each connected to one input of the differential amplifier. Capacitors are used to DC decouple the common base input stages to the differential amplifier.