Infrared Fourier transformation spectometer with plural analog-t

Details Infrared Fourier transformation spectometer with plural analog-t Infrared Fourier transformation spectometer with plural analog-t

1990-10-23

1993-04-13

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

341138, 341141, H03M 118

Patent

active

052026868

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.

REFERENCES:
patent: 4069479 (1978-01-01), Carpenter et al.
patent: 4129864 (1978-12-01), Carpenter et al.
patent: 4449120 (1984-05-01), Rialan et al.
patent: 4823129 (1989-04-01), Nelson
patent: 4926175 (1990-05-01), Ishizawa et al.
patent: 4999628 (1991-03-01), Kakubo et al.

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