Invention Grant
- Patent Title: Segmented digital-to-analog converter with subtractive dither
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Application No.: US17455221Application Date: 2021-11-17
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Publication No.: US11637560B2Publication Date: 2023-04-25
- Inventor: Martin Clara , Daniel Gruber , Kameran Azadet
- Applicant: Intel Corporation
- Applicant Address: US CA Santa Clara
- Assignee: Intel Corporation
- Current Assignee: Intel Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: 2SPL Patentanwälte PartG mbB
- Agent Yong Beom Hwang
- Priority: EP20216813 20201223
- Main IPC: H03M1/20
- IPC: H03M1/20 ; H03M1/10

Abstract:
A segmented digital-to-analog converter (DAC) includes DAC segments, an overrange DAC, and a dither control circuit. Each DAC segment includes a plurality of DAC cells for generating an analog output signal based on input data to each DAC segment. The overrange DAC generates an analog output signal based on a control signal. The dither control circuit adds a dither to first input data supplied to a higher-order DAC segment, subtract a portion of the dither from second input data supplied to a lower-order DAC segment, and generate the control signal for subtracting a remaining portion of the dither from an output of the segmented DAC in an analog domain. The dither added to the first input data may be one of +1, 0, and −1 and the portion of the dither subtracted from the second input data may be a half of the dither added to the first input data.
Public/Granted literature
- US20220200617A1 Segmented digital-to-analog converter with subtractive dither Public/Granted day:2022-06-23
Information query
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