Infrared Fourier transformation spectometer with plural analog-to-digital converters and interleaved amplification factors
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United States of America Patent
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Apr 13, 1993
Grant Date -
N/A
app pub date -
Oct 23, 1990
filing date -
Oct 26, 1989
priority date (Note) -
Expired
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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.
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