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US 2006/0222135 A1Published application
Methods and apparatus for digital linearization of an analog phase interpolator
AssigneeAgere Systems Inc.
InventorsMohammad Mobin, Gregory Sheets, Lane Smith, Craig Ziemer
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Abstract
Methods and apparatus are provided for digital linearization of an analog phase interpolator. Up to 2N desired phase values are mapped to a corresponding M bit value, where M is greater than N. A corresponding M bit value is applied to the phase interpolator to obtain a desired one of the 2N desired phase values. A linearized phase interpolator is also provided that accounts for process, voltage, temperature or aging (PVTA) variations.
Claims20
A method for linearizing a phase interpolator, comprising:
- obtaining a mapping of up to 2N desired phase values to a corresponding M bit value, where M is greater than N;
- and
- applying a corresponding M bit value to said phase interpolator to obtain a desired one of said 2N desired phase values.
A linearized phase interpolator, comprising:
- a plurality of storage elements each storing an M bit value corresponding to one of up to 2N desired phase values, where M is greater than N;
- and
- a selector for selecting a corresponding M bit value to apply to a control input of said linearized phase interpolator to obtain a desired one of said 2N desired phase values.
An integrated circuit, comprising:
- a linearized phase interpolator, comprising:
- a plurality of storage elements each storing an M bit value corresponding to one of up to 2N desired phase values, where M is greater than N;
- and
- a selector for selecting a corresponding M bit value to apply to a control input of said linearized phase interpolator to obtain a desired one of said 2N desired phase values.
1 more element
Dependencies are inferred from the claim text.