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. 31, 2002
Filed:
Nov. 10, 2000
Kimo Tam, Lincoln, MA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
An input bias current reduction circuit for multiple input stages having a common input includes a plurality of input stages each including a first input transistor with its base connected to the common input and the first current sensing transistor with its collector-emitter in series with the collector-emitter of the first input transistor and its base current replicating that of the first transistor; and a current compensation circuit for sensing the base current of the first current sensing transistor in each input stage and subtracting that from the base current of the first input transistor in each input stage for maintaining constant reduced current loading of the input.