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US 2015/0091746 A1Published application
Successive Approximation Register Analog-to-Digital Converter With Single-Ended Measurement
AssigneeSilicon Laboratories Inc.
InventorXiaodong Wang
Life of this patent
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Abstract
A circuit may include a comparator having a first input, a second input, and an output. The circuit further may further include a successive approximation register (SAR) circuit coupled to the output of the comparator, the first input, and the second input. The SAR circuit may be configured to program one or more capacitors to selectively bias the first input to provide a single-ended measurement of a voltage at the second input.
Claims20
A circuit comprising:
- a comparator including a first input, a second input, and an output;
- and
- a successive approximation register (SAR) circuit coupled to the output of the comparator, the first input, and the second input, the SAR circuit configured to program one or more capacitors to selectively bias the first input to provide a single-ended measurement of a voltage at the second input.
A method comprising:
- in a first mode:
- programming a first plurality of capacitors of a feedback digital-to-analog converter (DAC) of a successive approximation register (SAR) coupled to a first input of a comparator;
- receiving a voltage at a second input of the comparator;
- and
- comparing the voltage at the second input to a signal at the first input using the comparator to produce a digital output signal corresponding to a single-ended measurement of the voltage.
2 more elements
A circuit comprising:
- a comparator including a first input, a second input, and an output;
- and
- a successive approximation register (SAR) circuit coupled to the output of the comparator, the SAR circuit configured to program one or more capacitors of a feedback digital-to-analog converter (DAC) coupled to at least one of the first input and the second input to selectively provide a single-ended measurement mode.
Dependencies are inferred from the claim text.