DAC having switchable current sources and resistor string
US7046182B1 · kind B1 · utility
11Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2004 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Aug 25, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/808
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A DAC architecture is provided which is monotonic in operation despite any mismatches in the components. The architecture is a segmented architecture and hence it is area efficient. This is achieved by effecting a generation of analog voltages by driving current sources to resistors in response to digital input. In a preferred embodiment, the invention provides a resistor string coupled between output and vref-, and set of current sources. The current sources are switched to nodes between resistors to generate voltages at the output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.