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US 12,525,987 B2Granted
System for and method of analog to digital conversion using calibration
AssigneeAvago Technologies International Sales Pte. Limited
InventorsJun Zhou, Hongwu Chi
Life of this patent
Estimating the term…
Abstract
The systems and methods discussed herein related to analog to digital conversion. An apparatus can include an analog to digital converter including a loop circuit and a comparator circuit. The apparatus can also include a first circuit configured to provide comparator offset calibration for the comparator circuit and a second circuit configured to provide loop calibration for the loop circuit.
Claims20
An apparatus, comprising:
- an analog to digital converter comprising a loop circuit and a comparator circuit;
- a first circuit configured to provide comparator offset calibration for the comparator circuit;
- and
- a second circuit configured to provide loop calibration for the loop circuit, the second circuit comprising:
- a frequency estimator;
- and
- an analyzer configured to:
- receive a first frequency measurement from the frequency estimator for a first stage of the loop calibration;
- adjust a resistance or a capacitance of the first stage of the loop calibration;
- receive a second frequency measurement from the frequency estimator for a second stage of the loop calibration;
- and
- adjust a resistance or a capacitance of the second stage of the loop calibration.
9 more elements
An analog to digital converter, comprising:
- a loop circuit having a first stage and a second stage;
- and
- a first circuit configured to provide loop calibration for the first stage and loop calibration for the second stage, and the first circuit comprising:
- a frequency estimator;
- and
- an analyzer configured to:
- receive a first frequency measurement from the frequency estimator for the first stage;
- adjust a resistance or a capacitance in the first stage;
- receive a second frequency measurement from the frequency estimator for the second stage;
- and
- adjust a resistance or a capacitance in the second stage.
8 more elements
A method comprising:
- providing comparator offset calibration for a comparator circuit of an analog to digital converter using on-chip circuitry;
- and
- providing loop calibration for a loop circuit of the analog to digital converter using the on-chip circuitry, and the on-chip circuitry comprising:
- a frequency estimator;
- and
- an analyzer configured to:
- receive a first frequency measurement from the frequency estimator for a first stage of the loop calibration;
- adjust a resistance or a capacitance in the first stage;
- receive a second frequency measurement from the frequency estimator for a second stage of the loop calibration;
- and
- adjust a resistance or a capacitance in the second stage.
8 more elements
Dependencies are inferred from the claim text.