Dual digital to time converter (DTC) based differential correlated double sampling DTC calibration
US9520890B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2015 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Dec 23, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/82
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.