D/A converter circuit having offset voltage application device
US5818372A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | May 7, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/66
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A D/A converter circuit has at least two multiple-bit type D/A converters connected in parallel with each other. The circuit also includes a random signal generation circuit that generates a random signal voltage having a voltage value that timewise, randomly changes at each sampling cycle. The random signal voltage is added to and subtracted from a digital signal to be inputted to the at least two D/A converters. As a result, offset voltages whose sum is zero are added to the digital signals to be inputted to the D/A converters. The signals are D/A converted by the plurality of D/A converters to provide analog outputs, which are then added together by an analog adder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.