A/D converter
US7642944B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 2007 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Dec 11, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/365
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A full-flash A/D converter, including a differential amplifier circuit row and a voltage comparison circuit row, has an adjusting circuit 107 for making the output dynamic range of differential amplifier circuits accurately fall within the input dynamic range of voltage comparison circuits. The adjusting circuit 107 includes a reference voltage generation circuit 119, which has therein voltage generation circuits 122 whose resistors are connected in series. By this series connection, the area of the voltage generation circuits 122 is reduced, while the output dynamic range of the differential amplifier circuits A1 to Am+1 in the differential amplifier circuit row 102 accurately falls within the input dynamic range of the voltage comparison circuits Cr1 to Crm+1 in the voltage comparison circuit row 103. Furthermore, half-circuits in the voltage generation circuits 122 are used to generate reference voltages, whereby the area of the voltage generation circuits is reduced further.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.