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:
Jan. 01, 1985
Filed:
Nov. 26, 1982
Applicant:
Inventors:
Arthur J Metz, Gervais, OR (US);
Kenneth G Schlotzhauer, Beaverton, OR (US);
Assignee:
Tektronix, Inc., Beaverton, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330261 ; 330149 ;
Abstract
A current-limiting circuit for a differential amplifier includes a voltage generator which is switched in parallel with a signal-current-generating impedance connected between the emitters of the differential amplifier transistors whenever an input signal exceeds the voltage of the voltage generator. A practical embodiment for limiting the current in either direction for opposite-polarity input signals includes a pair of voltage generators cross-coupled from a respective differential amplifier transistor base to the opposite transistor emitter via transistor switches.