Auto-range current mirror circuit
US7352245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2006 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Sep 14, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/7236
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An auto-range current mirror circuit has a current sensing circuit, a front and rear stage current mirrors each has an adjustable amplifying rate. The current sensing circuit presets a threshold current and has an input current of the front stage current mirror. The current sensing current compares the input current with a threshold current and then outputs a controlling signal to the front and rear stage current mirrors to adjust a suitable amplifying rate. Therefore, a bias current of the rear stage current mirror is amplified by the suitable amplifying rate to improve the quality of output current of the rear stage current mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.