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Dual digital to time converter (DTC) based differential correlated double sampling DTC calibration

A converter, time difference technology, used in time-to-digital converters, analog-to-digital conversion, devices for measuring time intervals, etc., can solve problems such as distortion, spectral regrowth, spurious, etc.

Inactive Publication Date: 2017-08-08
INTEL IP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although widely used, DTCs have integral nonlinearity (INL) and differential nonlinearity (DNL) associated with them, which produce distortion, spectral regrowth, and spurious

Method used

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  • Dual digital to time converter (DTC) based differential correlated double sampling DTC calibration
  • Dual digital to time converter (DTC) based differential correlated double sampling DTC calibration
  • Dual digital to time converter (DTC) based differential correlated double sampling DTC calibration

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Embodiment Construction

[0018] The present disclosure will now be described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout, and the structures and devices shown therein are not necessarily drawn to scale. As used herein, the terms "component," "system," "interface," etc., are intended to mean computer-related entities, hardware, software (eg, in execution), and / or firmware. For example, a component can be a processor (e.g., a microprocessor, controller, or other processing device), a process running on a processor, a controller, an object, an executable, a program, a storage device, a computer, a tablet PC, and / or Or a user device (eg mobile phone, etc.) with a processing device. As an illustration, applications running on servers and servers can also be components. One or more components can reside within a process and a component can be localized on one computer and / or distributed between two or more computers. A set of elements or a ...

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PUM

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Abstract

A system for calibrating a digital to time converter (DTC), includes a first DTC configured to receive a first digital input code and generate a first DTC output signal, and a second DTC configured to receive a second digital input code and generate a second DTC output signal. Further, the system includes a delay circuit configured to apply a first delay to the first DTC output signal to generate a first delayed DTC output signal and a phase detector circuit configured to determine a phase difference between the first delayed DTC output signal and the second DTC output signal, thereby generating a phase detector output. In addition, the system includes a calibration circuit configured to adjust the first digital input code of the first DTC to an adjusted first code that minimizes the phase detector output, based on a search algorithm.

Description

technical field [0001] The present disclosure relates to digital-to-time converters (DTCs), and in particular to methods of calibrating DTCs using double DTC based correlated double sampling. Background technique [0002] Digital-to-time converters (DTCs) are a very promising solution for many applications such as digital polar transmitters, fractional-n clocks, or others. DTC enables more applications due to improved system key performance indicators (KPIs), such as improved radio transmitter efficiency, support for wide bandwidth modulation, generation of multiple carrier frequencies without the need for inductors, improved immunity, ease of porting to new Process technology nodes, etc. Although widely used, DTCs have integral nonlinearity (INL) and differential nonlinearity (DNL) associated therewith, which produce distortion, spectral regrowth, and spurs at the output of the DTC. Therefore, DTC circuits need to be linearized in order to achieve optimum performance and ...

Claims

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Application Information

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IPC IPC(8): G04F10/00
CPCG04F10/005H03M1/1014H03M1/82
Inventor A·本-巴萨特A·拉维O·德加尼
Owner INTEL IP CORP