Title: RF mixing device
Application Number: 200410090369 Application Date: 2004.11.04
Publication Number: 1614877 Publication Date: 2005.05.11
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03D3/06
Applicant(s) Name: Infineon Technologies AG Address:
Inventor(s) Name: A. Hanko;M. Siemon
Attorney & Agent: cheng tianzheng zhang zhicheng
Abstract:
    The present invention relates to a radio-frequency mixer arrangement in which a differential amplifier is connected to an input on a multiplier. The differential amplifier is arranged together with at least one capacitance in the feedback path of an operational amplifier. The at least one capacitance performs the function of an antialiasing filter. The feedback operational amplifier with the design described results in a highly linear output signal given low output noise and a low current requirement. The mixer proposed is particularly suitable for use in vector modulators or polar modulators in transmission paths in mobile radios.
Time: 17