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:
Sep. 09, 2008
Filed:
Sep. 20, 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) for amplifying an input signal (Vin) input into the circuit arrangement () and outputting the amplified input signal as an output signal (Vout). The circuit amplification (Vout/Vin) may be changed by selectively connecting or disconnecting impedances (R, . . . RN). Integration elements (INT. . . INT N) connected upstream from each of the control inputs of transistors (S, . . . SN) used for this purpose ensure a certain temporal smoothing of the curve of the circuit amplification (Vout/Vin) when connecting or disconnecting an impedance (R, . . . RN). The integration element particularly ensures that even in the event of a sudden change of the affected activation signal (VD, . . . VDN), the affected impedance (R, . . . RN) is not also suddenly disconnected or connected.