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:
Oct. 09, 2007
Filed:
Jan. 19, 2006
A. Paul Brokaw, Tucson, AZ (US);
A. Paul Brokaw, Tucson, AZ (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
An amplifier output voltage swing extender circuit comprises a differential amplifier powered between first and second power supply rails, which receives first and second input signals at non-inverting and inverting inputs, respectively, and provides an output at a first output node. A level shifting circuit, preferably a voltage divider, is connected in series with the first output node and shifts the node voltage toward the second rail by a fixed amount; the shifted voltage is provided at a second output node. A feedback network couples the second output node voltage to the amplifier's inverting input, such that when a voltage VSET is applied to the non-inverting input, the maximum negative voltage excursion at the first and second output nodes is greater than the value of the VSET voltage with respect to the second supply rail.