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. 03, 2006
Filed:
Nov. 03, 2004
Patrick P. Siniscalchi, Sachse, TX (US);
Patrick P. Siniscalchi, Sachse, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A circuit topology for gain boosted high-swing folded cascode has been improved to maximize the available dynamic range in applications having low supply voltage requirements. The circuit includes an improved gain boost amplifier that maximizes the available dynamic range for applications having low supply voltage requirements. The improved gain boosting amplifier includes a differential pair of input transistors connected to a current mirror, wherein a pair of current sources supply current to each lead of the current mirror. One lead of the current mirror is level-shifted by a transistor coupled to another current source, wherein the coupling of the transistor and the current source form the output of the amplifier. Effectively, the amplifier consists of a level shifter and a series common-drain, common-gate amplifier. A reduction in transconductance gfrom the series combination is compensated by a current mirror ratio (K:1) between the level shift and the common-drain, common-gate amplifier.