Current mirror compensation circuit and method
US7061307B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2003 |
| Grant date | Jun 13, 2006 |
| Priority date | — |
| Expiry date | Sep 26, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00156
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A current compensation circuit for use with a current mirror is disclosed. The current mirror circuit has a current path defined by a first current mirror stage driving a second current mirror stage, the second current mirror stage is coupled to a supply voltage source. The current compensation circuit comprises an impedance divider coupled to the supply voltage and an output node. The impedance divider operates to generate a compensation signal at the node representative of voltage changes in the supply voltage source. The compensation circuit further includes a gain stage having an input coupled to the output node and a current output connected to the current path. The gain stage operates to generate a compensation current for application to the current path in response to the compensation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.