Signal processor for a measurement apparatus

Details Signal processor for a measurement apparatus Signal processor for a measurement apparatus

1997-07-03

1999-07-20

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

341155, G01N 3086

Patent

active

059261242

ABSTRACT:
In a signal processor according to the present invention, an analog output signal of a measurement apparatus is first amplified by an amplifier, where the gain can be changed. The amplified analog signal is then sampled and converted by an A/D converter to a digital data. When the value of the digital data is smaller than a preset reference value, a gain determining element determines the gain at a larger value, which will be used for the next sampled data. When, conversely, the value of the digital data is larger than another preset reference value, the gain determining element determines the gain at a smaller value so that a signal saturation in the A/D converter will be prevented in the next data sampling. When the value of one of two consecutively sampled digital data is greater than the preset second reference value, the data is disregarded and the other data is used as the measurement data, which prevents producing an erroneous measurement data output and assures the quality and preciseness of the sample analysis using the measurement data.

REFERENCES:
patent: 4842085 (1989-06-01), Lang
patent: 4859964 (1989-08-01), Jorgensen

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