High-speed, single-slope analog-to-digital converter
US7656336B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 2007 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Apr 3, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/504
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system and method for converting an analog signal to a digital signal is disclosed. The system includes a multiphase oscillator preferable a rotary oscillator, a sample and hold circuit, an integrator and a time-to-digital converter. The multiphase oscillator has a plurality of phases that are used in the time-to-digital converter to measure the time of a pulse created by the integrator. The edges of the pulse may optionally be sharpened by passing the pulse through a non-linear transmission line to improve the accuracy of the measurement process. To cut down on noise a tuned power network provides power to the switching devices of the rotary oscillator. Calibration is performed by fragmenting the sample and hold circuit and integrator and performing a closed loop calibration cycle on one of the fragments while the other fragments are joined together for the normal operation of the sample and hold and integrator circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.