Variable gain current amplifier with a feedback loop including a differential pair
US6798291B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Nov 12, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45648
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a current amplifier. The current amplifier according to the present invention includes a voltage amplifier with a predetermined gain, an input and an output. A transistor is connected to the output of the voltage amplifier. A differential pair of transistors is connected between the transistor and the input of the voltage amplifier. The gain of the current amplifier varies according to the to the voltage applied to the input of the differential pair of transistors. Further, a current through the transistor will be divided into a feedback current and an output current according to the voltage applied to the input of the differential pair of transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.