D/A converter circuit
US7639166B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Jun 12, 2008 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Jun 12, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/765
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multi-bit D/A converter circuit that prevents a bit inversion and requires a reduced layout area is offered. A first switching circuit is provided in order to select a pair of analog voltages generated across one of resistors in a first resistor string. The selected pair of analog voltages is provided as reference voltages to a second resistor string. A second switching circuit is provided in order to select a pair of analog voltages generated across one of the resistors in the second resistor string. The selected pair of analog voltages is provided as reference voltages to a third resistor string. A third switching circuit is provided in order to select one of analog voltages generated in the third resistor string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.