Amplifier arrangement for an acceleration pick-up

Abstract

Abstract An amplifier arrangement for an acceleration pick-up (10), in particular a piezoelectric acceleration pick-up for restraint systems in motor vehicles is proposed, the output signal of the amplifier arrangement being compared, for the purpose of offset compensation, in a comparator (27) with a reference voltage in a fixed or variable time slice. Depending on the output signal of this comparator (27), the output current of a current source (35) is increased or decreased in the time slice, and fed to the amplifier input for the purpose of compensation. It is possible in this way for the offset drift to be compensated via the time and temperature, even in the case of cheap acceleration pick-ups. <IMAGE>

Inventors

• 👤 Darko Dipl.-Ing. Brodarac
• 👤 Wolfram Dr.-Ing. 7410 Reutlingen Glauert
• 👤 Bernahrd Dipl.-Ing. 7123 Sachsenheim Mattes
• 👤 Eberhard Dipl.-Ing. 7140 Ludwigsburg Mausner
• 👤 Winfried Dipl.-Ing. 7410 Reutlingen Speidel

Bibliographic Details