Method of converting analog signals into digital signals and system for carrying out the method
US4937579A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 16, 1988 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Nov 16, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/188
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The same analog signal is inputted to an 8-bit AD converter and to a 4-bit AD converter to obtain an 8-bit digital data and a 4-bit digital data for the same sample value of the analog signal. Values of the 8-bit digital data and 4-bit digital data are compared with each other. The 8-bit digital data is outputted as a digital signal for the sample value of the analog signal when a difference between these values is not greater than one-half the quantity that corresponds to the least significant bit of the 4-bit digital data, and the 4-bit digital data is outputted as a digital signal for the sample value of the analog signal in other cases. There is realized AD conversion which operates apparently at high speeds maintaining high accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.