Negative feedback amplifier circuit
US6340918B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2000 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Nov 30, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/56
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An amplifier circuit comprises a first amplifier stage controlling a second gain stage which is coupled between a voltage input node and an output node. A frequency compensating circuit is coupled between a compensating circuit node of the gain stage and a control input of the gain stage. The gain stage comprises first and second output devices arranged such that for a given gate voltage, the output current from the first device is greater than the output current from the second device. The output devices have a common source coupled to the input node and a common gate coupled to the first amplifier stage. The drain of the first output device is coupled to the output node and the drain of the second output device is coupled to the compensating circuit node with a resistance device connected between the two drains.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.