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:
Nov. 23, 2004
Filed:
Mar. 04, 2003
Adrian Paul Brokaw, Tucson, AZ (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
A high gain amplifier includes a differential amplifier stage having a pair of transistors; first and second input circuits for providing input signals to the pair of transistors; transistor means arranged as a differential-to-single-ended converter driven by the differential amplifier stage to provide a single ended output signal; an intermediate gain stage having an input responsive to the single ended output signal; bias means for the differential amplifier, the bias means including circuit means for maintaining the currents through the pair of transistors in constant ratio independently of changes in load at the intermediate gain stage; and an inverting gain output stage driven by the intermediate gain stage and having an output for driving a load substantially from rail to rail. Also disclosed is a frequency compensation capacitor circuit connected between the input of the intermediate gain stage and the output of the inverting gain output stage.