Nonlinear ADC with digitally selectable quantizing characteristics

Journal Article · Sat Oct 01 00:00:00 EDT 1988 · IEEE Trans. Nucl. Sci.; (United States)

DOI:https://doi.org/10.1109/23.7504· OSTI ID:6718902

Lygouras, J N

In this paper a method is presented for generating linear or nonlinear functions digitally. The Nonlinear Analog to Digital Conversion (NLADC) is accomplished using the Pulse Width Modulation (PWM) of the analog input voltage. The conversion is done according to a special Quantizing Characteristic Function (Q.C.F.), which depends on the specific application. This special Q.C.F. sampled, quantized and coded has been stored in an EPROM. The quantizing characteristic can be any monotonically increasing function of any type (e.g. linear, square, exponential e.t.c.) resulting in a very flexible linear or nonlinear A/D converter. More than one Q.C.F. can be stored in the EPROM. Such a NLADC could be used for the expansion or compression of the dynamic range in Nuclear Science measurements, in robotics for the cartesian space path planning, as in the case of Pulse Code Modulation (PCM) nonlinear quantization, e.t.c. The corresponding nonlinear Digital to Analog Converter is described.

• Research Organization: Dept. of Electrical Engineering, School of Engineering, Univ. of Thrace, 67100 Xanthi (GR)
• OSTI ID: 6718902
• Journal Information: IEEE Trans. Nucl. Sci.; (United States), Vol. 35:5
• Country of Publication: United States
• Language: English

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