Multiplexed analog-to-digital converter for relative and absolute voltage measurements
US5736949A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1997 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Jan 17, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1225
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multiplexed analog-to-digital converter to accept multiple dissimilar analog input signals and convert each analog input signal to a digital code that represents the ratio of the magnitude of the analog input signal to the difference of an upper reference voltage source and a lower reference voltage source is disclosed. The upper reference voltage source is selected by an analog multiplexer from a set of voltage reference sources that include the power supply voltage source of the analog-to-digital converter for analog input signals that are reference to the power supply voltage source, and a precision reference voltage source that is referenced to the band-gap of silicon to provide an absolute measurement of the analog input signal. The lower reference voltage source is selected by a multiplexer from such references as a ground reference source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.