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:
Jun. 26, 2012
Filed:
Feb. 14, 2006
Applicant:
Vincenzo Ditommaso, Beaverton, OR (US);
Inventor:
Vincenzo DiTommaso, Beaverton, OR (US);
Assignee:
Analog Devices, Inc., Norwood, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06G 7/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
An input signal is applied to a ratiometric gain/attenuator circuit. A nulling circuit is arranged to null the input signal with an output from the ratiometric gain/attenuator circuit. The ratiometric gain/attenuator circuit may include a gain stage in series with a ratiometric attenuator. By implementing the attenuator ratiometrically, the gain may be compensated with reference to a ratio of component values. A limiting stage with an absolute reference may precede the gain stage, and a pair of detector cells may arranged at the inputs to the nulling circuit.