Feed back current-source circuit
US6690229B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2002 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Dec 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/262
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a current-source circuit in which a first and a second MOS field-effect transistor form a current mirror circuit, wherein a reference current can be supplied to the first MOS field-effect transistor via a third MOS field-effect transistor connected in cascode and the drain electrode of a fourth MOS field-effect transistor connected to the second MOS field-effect transistor in cascode forms an output, the source electrodes of the third and of the fourth MOS field-effect transistors are connected to inputs of an automatic gain control amplifier whose output is connected to the gate electrode of the fourth MOS field-effect transistor. The fourth MOS field-effect transistor is an extended-drain MOS field-effect transistor. The drain electrode and the gate electrode of the fourth MOS field-effect transistor are connected to one another via a further MOS field-effect transistor whose gate electrode is acted on by an operating voltage for the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.