Invention Grant
- Patent Title: Randomized time-interleaved digital-to-analog converters
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Application No.: US15490762Application Date: 2017-04-18
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Publication No.: US09966969B1Publication Date: 2018-05-08
- Inventor: Gil Engel , Shawn S. Kuo , Steven C. Rose
- Applicant: Analog Devices, Inc.
- Applicant Address: unknown Norwood
- Assignee: Analog Devices, Inc.
- Current Assignee: Analog Devices, Inc.
- Current Assignee Address: unknown Norwood
- Agency: Patent Capital Group
- Main IPC: H03M1/66
- IPC: H03M1/66 ; H03M1/12

Abstract:
A time-interleaved digital-to-analog converter (DAC) uses M DAC cores to convert a digital input signal whose digital input words are spread to different DAC cores to produce a final analog outputs. The M DAC cores, operating in a time-interleaved fashion, can increase the sampling rate several times compared to the sampling rate of just one DAC. However, sequential time-interleaving DAC cores often exhibit undesirable spurs at the output. To spread those spurs to the noise floor, the time-interleaving DAC cores can be selected at a pseudo randomized manner or in a specific manner which can break up the sequential or periodic manner of selecting the DAC cores.
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