MOS operational amplifier with current mirroring gain and method of operation
US7834689B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2009 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Jul 22, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/30114
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier has an input stage coupled to a current mirror for providing a first control signal. A gain boosting stage has first and second sections, each having first and second inputs and an output. The first input of the first section is coupled to the input stage. The second input of the first section is a first node between a source and a drain of a first pair of series-coupled transistors. The first input of the second section is coupled to the current mirror. The second input of the second section is a second node between a source and a drain of a second pair of series-coupled transistors. A pre-driver stage has inputs coupled to the input stage and the gain boosting stage. The pre-driver stage provides inputs to the gain boosting stage and receives outputs from the gain boosting stage prior to coupling to an output stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.