Digital-to-analog converter with temperature compensation
US6593864B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 2002 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Apr 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/822
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A PWM DAC including an emitter follower buffer circuit provides increased accuracy and reduced cost. The emitter follower buffer circuit that enables inexpensive implementation of the PWM DAC. A temperature compensation circuit adjusts the digital input value applied to the PWM to compensate for temperature-induced variation introduced by the emitter follower buffer circuit. The compensation circuit may incorporate circuitry that replicates the PWM DAC at least in part, and monitors the base-emitter voltage of a replicated emitter follower buffer to track temperature-induced variation in the PWM DAC. The compensation circuit generates an error value that can be used to compensate one or more PWM DACs within a particular system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.