Author_Institution :
Analogy Inc., Beaverton, OR, USA
Abstract :
A mixed-mode behavioral model of analog-to-digital (A/D) converters is described. A generalized model structure is introduced. The basic function of an A/D converter is to convert an analog voltage into a digital code, for example, a binary number. Three conversion methods (successive approximation, flash, and dual integration) which are commonly used in A/D converters are modeled and can be selected simply by specifying a parameter of the model. For brevity, only the successive-approximation method is described. The modeling considerations of various parts in the A/D converter, including the input amplifier, D/A converter, comparator, and the synchronization problem, are described. The model has been implemented in the Saber mixed-mode simulator. Simulation results are given
Keywords :
analogue-digital conversion; comparators (circuits); digital simulation; A/D converters; D/A converter; Saber; behavioral model; comparator; input amplifier; mixed-mode simulator; successive approximation; synchronization problem; Analog-digital conversion; Circuit simulation; Clocks; Degradation; Digital-analog conversion; Feeds; Logic; Signal resolution; Synchronization; Voltage;
