Integrated circuit arrangement for minimizing the temperature-dependant offset voltage of an amplifier
US5805004A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1996 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Mar 7, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45479
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier is connected to a voltage subtractor which is connected in a predetermined current path of the amplifier to adjust the temperature-dependent voltage offset of an amplifier or of an amplifier chain. If the voltage subtractor is connected at the output of the amplifier or of an amplifier chain, then the temperature-dependent offset voltage can be subtracted using suitable means, without the amplifier itself having to be compensated. As a voltage subtractor, an operational amplifier is proposed, in the case of which the offset voltage is subtracted by means of negative feedback. The negative feedback is produced by means of a resistor having two current power sources. The voltage subtractor is preferably connected in outgoing circuit to the amplifier and constructed in accordance with the same layout rules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.