Analog-to-digital conversion apparatus and sensing apparatus having the same
US7844102B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2006 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Sep 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/60
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sensing apparatus includes a reference voltage generation circuit for generating a first and a second reference signals having different constant voltage levels, an A/D conversion circuit having a ring-gate-delay circuit, and a correction circuit for correcting an output value of the A/D conversion circuit. The A/D conversion circuit converts a load signal and the first and second reference signals to digital data based on the number of times a pulse signal input to the ring-gate-delay circuit circulates through the ring-gate-delay circuit. The correction circuit corrects the output value based on a ratio of a first difference between the digital data to a second difference between the digital data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.