Infrared Fourier transformation spectometer with plural analog-to-digital converters and interleaved amplification factors

US5202686A · kind A · utility

Assignee

• Bruker Analytische Messtechnik GmbH · DE

Inventors

• Norbert Rapp · Malsch, DE
• Jean-Francois Blavier · Fléron, BE
• Arno Simon · Ettlingen, DE

Key dates

• Filing date: Oct 23, 1990
• Grant date: Apr 13, 1993
• Expiry date: Oct 23, 2010

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M1/188
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An infrared Fourier transformation spectrometer comprising a non-linear analog-to-digital converter device having at least one amplifier and one sample and hold circuit connected downstream thereof, as well as an an analog-to-digital converter following the latter, wherein an input signal to be converted is to be supplied to one input of the amplifier and the gain of the input signal is a function of the magnitude fo the input signal, and wherein the output signal of the analog-to-digital converter is evaluated giving regard to the respective gain, is characterized by the fact that at least two analog-to-digital converters are provided whose outputs are connected to a first controllable switching arrangement for supplying selectively the output signals of one of the said analog-to-digital converters to another evaulation means and that the input signal is supplied to each of the said analog-to-digital converters amplified by a different amplification factor. This allows to achieve high resolution by simple means.