Low voltage class AB output stage CMOS operational amplifiers
US5900783A · kind A · utility
15Cited by
6References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Aug 4, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45182
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit is disclosed for a complimentary metal oxide semiconductor (CMOS) operational amplifier output stage which can be connected easily to almost any input stage design and which can be coupled directly to that input stage. The circuit uses nine small transistors and two output transistors. The output transistors are connected in series between the power supply rails and the size of the two output transistors determines the current available to the load. The circuit of the invention can provide rail-to-rail output voltage swings and can drive a low ohm resistive load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.