Patent · US Active

Amplifier circuit having an output transistor for driving a complex load

US7642854B2 · kind B2 · utility

1Cited by

5References

18Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Xianghua Shen · Unterhaching, DE
Markus Schimper · Erding, DE

Key dates

Filing date	Jun 6, 2007
Grant date	Jan 5, 2010
Priority date	—
Expiry date	Nov 12, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2203/30138
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

An amplifier circuit is disclosed having an output transistor for driving a complex load over a drive frequency range, wherein in the lower part of the range an inductive component of the load dominates and in the upper part the inductive component does not dominate. The amplifier circuit includes a current mirror circuit that is connected upstream of the output transistor and has a shunt path to a second potential, for the purpose of relatively reducing a DC current flowing through the output transistor in comparison with an AC current flowing through the latter.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.