Successive approximation analog-to-digital converter (ADC) with dynamic search algorithm
AssigneeMaxLinear, Inc.
InventorsRaja Pullela, Curtis Ling
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Abstract
Aspects of a method and system for a successive approximation analog-to-digital converter with dynamic search algorithms are provided. In some embodiments, a successive approximation analog-to-digital converter includes a digital-to-analog converter, a comparator, and a search and decode logic modules which cooperate to generate a digital output code representative of the analog input voltage based on a dynamic search algorithm. The dynamic search algorithms may alter a sequence of reference voltages used to successively approximate the analog input voltage based on one or more characteristics of the analog input voltage.
Claims20
A method of an analog-to-digital converter, comprising:
- determining, by the analog-to-digital converter, one or more probabilities, each of which corresponds to a probability that an analog input voltage will be in a corresponding one of a plurality of voltage ranges;
- selecting, by the analog-to-digital converter, a reference voltage based on the determined one or more probabilities;
- comparing, by the analog-to-digital converter, the analog input voltage to the reference voltage to obtain a comparison output;
- updating, by the analog-to-digital converter, the reference voltage based on the comparison output;
- and
- repeating, one or more times by the analog-to-digital converter, said comparing and said updating to obtain a digital output code representative of the analog input voltage.
A successive approximation analog-to-digital converter, comprising:
- a digital-to-analog converter operable to generate a reference voltage based on a digital reference code;
- a comparator operable to compare an analog input voltage to the reference voltage generated by the digital-to-analog converter and generate a comparison output indicative of the comparison;
- and
- a search and decode logic module comprising one or more circuits operable to:
- determine one or more probabilities, each of which corresponds to a probability that an analog input voltage will be in a corresponding one of a plurality of voltage ranges;
- select the digital reference code based on the determined one or more probabilities;
- update the digital reference code based on the comparison output;
- and
- repeat, one or more times, said update of the digital reference code to obtain a digital output code representative of the analog input voltage.
Dependencies are inferred from the claim text.