SEGMENTED DIGITAL-TO-TIME CONVERTER CALIBRATION
First Claim
1. A calibration circuit for a segmented digital-to-time converter (DTC), the segmented DTC configured to receive reference frequency information and to provide processed frequency information, the calibration circuit comprising:
- a calibration path configured to represent a segment of the segmented DTC;
a time-to-digital circuit configured to receive an output of the calibration path and the processed frequency information and to provide timing error information of the segment;
a calibration engine configured to receive controller modulation information from a main controller, to provide calibration modulation information to the segmented DTC, to receive the timing error information, and to provide compensation information to a correction circuit coupled to the segmented DTC using the timing error information.
1 Assignment
0 Petitions
Accused Products
Abstract
This application discusses, among other things, calibration systems for ameliorating nonlinearity of a digital-to-time converter (DTC). In an example, a calibration system can include a calibration path configured to represent a segment of the DTC, a time-to-digital circuit configured to receive an output of the calibration path and the processed frequency information and to provide timing error information of the segment, and a calibration engine configured to receive controller modulation information from a main controller, to provide calibration modulation information to the DTC, to receive the timing error information, and to provide compensation information to a correction circuit coupled to the DTC using the timing error information.
3 Citations
23 Claims
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1. A calibration circuit for a segmented digital-to-time converter (DTC), the segmented DTC configured to receive reference frequency information and to provide processed frequency information, the calibration circuit comprising:
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a calibration path configured to represent a segment of the segmented DTC; a time-to-digital circuit configured to receive an output of the calibration path and the processed frequency information and to provide timing error information of the segment; a calibration engine configured to receive controller modulation information from a main controller, to provide calibration modulation information to the segmented DTC, to receive the timing error information, and to provide compensation information to a correction circuit coupled to the segmented DTC using the timing error information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of calibrating a segmented digital-to-time converter (DTC), the method comprising:
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receiving modulation information at a calibration engine of a calibration circuit from a main controller; providing calibration modulation information to the segmented DTC and a calibration path of the calibration circuit from the calibration engine, the calibration path configured to represent the a segment of the segmented DTC; receiving an output of the DTC at a time-to-digital circuit; receiving an output of the calibration path at the time to digital circuit; providing timing error information of the segment to the calibration engine using the output of the DTC and the output of the calibration path; and providing compensation information to a correction circuit coupled to the segmented DTC using the timing error information and the calibration engine. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification