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:
Sep. 19, 1989
Filed:
Oct. 31, 1988
Pieter G Blanken, Eindhoven, NL;
Jan R De Boer, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An amplifier circuit, for example, a class AB output stage, includes a series arrangment of a first transistor (T.sub.1) and a second transistor (T.sub.2), both arranged as diodes, a series arrangement of a third transistor (T.sub.3) and a fourth transistor (T.sub.4) and a series arrangement of a fifth transistor (T.sub.5) and an impedance (R). The first main electrode of the first transistor (T.sub.1) is coupled via the impedance (R) to the control electrode of the fourth transistor (T.sub.4). The first main electrodes of the second and fifth transistors (T.sub.2, T.sub.5) are coupled together and to the control electrode of the third transistor (T.sub.3). The control electrodes of the first, second and fifth transistors (T.sub.1, T.sub.2 and T.sub.5) are coupled together and to the second main electrodes of the first and the second transistor. This circuit provides a small quiescent current in the output transistors using relatively small input transistors (T.sub.1, T.sub.2) and relatively large output transistors (T.sub.3, T.sub.4).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile