Patent · US Expired

Amplifier circuit for an oscillator in a defined oscillating frequency range and oscillator circuit

US7298224B2 · kind B2 · utility

0Cited by

2References

26Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Marcin Augustyniak · Regensburg, DE
Ralf Brederlow · Poing, DE
Marc Tiebout · Birkenfeld, DE

Key dates

Filing date	Feb 23, 2006
Grant date	Nov 20, 2007
Priority date	—
Expiry date	Apr 11, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH03F3/345
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

An amplifier circuit for an oscillator in a defined oscillating frequency range includes a plurality of transconductors, wherein at least one transconductor has a positive transconductance, and wherein at least one other transconductor has a negative transconductance, wherein the transconductors together provide a positive amplification, and a passive impedance element coupled to at least one fed back transconductor, wherein the transconductance of the transconductor and the impedance element are dimensioned so that, in the oscillating frequency range, a given phase difference is present between a signal at the input and a signal at the output.

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