Method and circuit for amplitude compensation in a digital-to-analog converter
US7268711B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2006 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Mar 24, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/66
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplitude-compensated digital-to-analog converter circuit and method of compensation. A unipolar digital-to-analog converter is provided, having a reference connection and a pair of differential, unipolar signal outputs. A sensing circuit senses the common mode component of the differential outputs and produces a common mode signal. A reference source produces a first reference signal, and a differential control amplifier compares the common mode signal to the first reference signal and applies a second reference signal applied to the reference connection of the digital-to-analog converter, thereby stabilizing the reference current for the digital-to-analog converter. The circuit includes a single signal output reference to ground and a multiple-pole low-pass filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.