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:
Feb. 16, 1999
Filed:
Jul. 01, 1996
Mathias Krauss, Ammerbuch, DE;
Zentrum Mikroelektronik Dresden GmbH, Dresden, DE;
Abstract
An amplifier circuit for analog-signal processing has an operational amplifier having an output, an inverting input, and supply inputs for accepting a single supply potential and a reference potential. The operational amplifier has a noninverting input capable of accepting a signal voltage of a varying analog signal input thereto which has a positive value range and a negative value range relative to the reference potential. The output is fed back to the inverting input and the operational amplifier has a differential amplifier having first and second field-effect transistors. The first field-effect transistor has a gate connected to the noninverting input of the operational amplifier and the second field-effect transistor has a gate connected to the inverting input. The first field-effect transistor has a threshold voltage lower than a threshold voltage of the second field-effect transistor by an amount at least equal to an amount of a value range of the analog signal voltage outside a range defined by the single supply potential and the reference potential to offset an output signal at the output to within the range defined by the single supply potential and the reference potential.