Pair of bipolar transistor complementary current sources with base current compensation
US6538495B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Dec 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/265
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pair of complementary current sources includes a reference current source, and two complementary current mirrors having the same number of branches provided with bipolar mirror transistors. The bases of the mirror transistors of the complementary mirrors are connected to a common node. One of the complementary mirrors is connected to the reference source. An intermediate current mirror includes a first slave branch connected to the other complementary current mirror, a second slave branch connected to the reference source, and a master branch connected to the output of a trimming circuit for trimming the complementary currents for substantially equalizing the base currents of the mirror transistors of the complementary current mirrors. The input of the trimming circuit is connected to the common node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.