Invention Application
- Patent Title: SYSTEM AND METHOD OF EXTENDING INPUT RANGE OF ANALOG TO DIGITAL CONVERTER
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Application No.: US18205250Application Date: 2023-06-02
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Publication No.: US20240405780A1Publication Date: 2024-12-05
- Inventor: Alphons Litjes , Erik Olieman
- Applicant: NXP B.V.
- Applicant Address: NL Eindhoven
- Assignee: NXP B.V.
- Current Assignee: NXP B.V.
- Current Assignee Address: NL Eindhoven
- Main IPC: H03M1/06
- IPC: H03M1/06

Abstract:
An analog to digital converter including a digital to analog converter (DAC), a comparator, and a controller. The DAC includes a sample node and a capacitor array controlled by a digital control input. The comparator compares a voltage of the sample node with a reference voltage to generate a comparison value. The controller presets the digital control input, prompts the DAC to sample the input voltage onto the sample node, resets the digital control input, and performs a conversion by successively adjusting the digital control input based on the comparison value to determine a digital output. A preset value is subtracted from the digital output to provide an adjusted digital output. A sample predictor predicts the next sample to determine the preset value used to adjust the sample node within a full scale range after DAC reset.
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