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:
Dec. 16, 1997
Filed:
Feb. 28, 1996
Juka Mikko Hakkarainen, Coconut Grove, FL (US);
General Electric Company, Schenectady, NY (US);
Abstract
An input signal buffer amplifier that has a high gain and a low offset voltage is implemented as an integrated circuit (IC) along with other components that perform further processing on an input signal. In one embodiment, the buffer amplifier includes first and second operational amplifiers (op amps). Voltage divider resistors R1 and R2 are connected in series between a positive voltage supply rail and a ground rail of the IC. The positive input terminal of the second op amp is electrically connected to a node between resistors R1 and R2. A feedback loop is established from the output of the second op amp to its negative terminal. The negative terminal of the first op amp is connected to a node between a series-connected input resistor and feedback resistor. The positive input terminal of the first op amp is connected to a node between series-connected voltage divider resistors R3 and R4 which are connected across the output of the second op amp and the ground rail. The first operational amplifier generates an output voltage signal VI+ and the second operational amplifier generates an output voltage signal VI-.