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:
Aug. 19, 2008
Filed:
Nov. 15, 2006
Thomas Blon, Jengen, DE;
Thomas Blon, Jengen, DE;
National Semiconductor Germany AG, Unterhaching, DE;
Abstract
The present invention relates to a circuit configuration having a feedback operational amplifier (AMP), which is implemented as fully differential, for amplifying an input signal differentially input to the circuit configuration and for outputting the amplified input signal as a differential output signal. In order to increase the freedom in setting the input common mode voltage, according to the present invention, a combination made of a coupling resistor (R) and a level shifter (I, Nsfb) connecting the positive amplifier output (y) to the inverting amplifier input (x) and a combination made of a coupling resistor (R) and a level shifter (I, Nsfa) connecting the negative amplifier output (y) to the noninverting amplifier input (x) are provided.