Circuit for temperature and beta compensation
US7202696B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 2004 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | Jan 6, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00376
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A compensation circuit is disclosed. The compensation circuit includes a driver stage having an output, a differential output device including a base coupled to the output of the driver stage, and a feedback block coupled to a first emitter of the differential output device. The differential output device includes a second emitter to provide a differential output, and the feedback block generates a feedback signal to adjust the differential output. The first emitter comprises a replicating transistor, and is proximate to the second emitter of the differential output device. By keeping the replicating emitter near the differential output device, the variances of temperature and process over the semiconductor die do not affect the performance of the compensation circuit. The compensation circuit may also compensate for variations in common-emitter current gain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.