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. 16, 2014
Filed:
May. 02, 2013
Applicant:
Analog Devices, Inc., Norwood, MA (US);
Inventor:
Barrie Gilbert, Beaverton, OR (US);
Assignee:
Analog Devices, Inc., Norwood, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03G 3/20 (2006.01); H03F 3/45 (2006.01); H03F 3/72 (2006.01); H03G 3/00 (2006.01); H03F 1/30 (2006.01); H03F 3/21 (2006.01); H03F 1/52 (2006.01);
U.S. Cl.
CPC ...
H03G 3/004 (2013.01); H03F 2203/45544 (2013.01); H03F 3/45282 (2013.01); H03F 3/72 (2013.01); H03F 2203/45424 (2013.01); H03F 2203/45702 (2013.01); H03F 2203/45526 (2013.01); H03F 2200/261 (2013.01); H03F 2203/45644 (2013.01); H03F 3/45089 (2013.01); H03F 2200/375 (2013.01); H03F 2203/45594 (2013.01); H03G 3/001 (2013.01); H03F 3/45475 (2013.01); H03F 3/4508 (2013.01); H03F 3/45278 (2013.01); H03F 2200/411 (2013.01); H03F 1/302 (2013.01); H03F 2203/45352 (2013.01); H03F 3/45497 (2013.01); H03F 2200/165 (2013.01); H03F 3/45852 (2013.01); H03F 2203/45358 (2013.01); H03F 2203/45548 (2013.01); H03F 3/211 (2013.01); H03F 2200/405 (2013.01); H03F 2203/45634 (2013.01); H03F 2203/45618 (2013.01); H03F 3/45937 (2013.01); H03F 2203/45732 (2013.01); H03F 1/52 (2013.01); H03F 2203/45301 (2013.01); H03F 3/45986 (2013.01); H03F 2200/168 (2013.01);
Abstract
A variable gain amplifier has an attenuator having an input and a series of tap points, and a series of low-inertia switches, each switch coupled to a corresponding one of the tap points to steer outputs from the attenuator to an output terminal. An amplifier has an input cell, a load coupled to an output of the input cell, a buffer having an input coupled to the load, a feedback network coupled between an output of the buffer and the input cell, and a variable filter cell coupled to the input cell.