Integrated circuit having a mixer circuit

US7509111B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Jörg Langenberg · Prien am Chiemsee, DE
• Thomas Liebermann · Munich, DE
• Werner Simburger · Haar, DE
• Marc Tiebout · Birkenfeld, DE
• Hans-Dieter Wohlmuth · Munich, DE

Key dates

• Filing date: Oct 29, 2004
• Grant date: Mar 24, 2009
• Expiry date: Jun 22, 2025

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03D2200/0084
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

Integrated circuit including a mixer circuit, which has a first circuit section, a second circuit section, and a transformer. The first circuit section has two radiofrequency terminals. The second circuit section has two reference oscillator terminals, an active mixer unit with a signal-amplifying unit, and two intermediate frequency terminals. The active mixer unit and the signal-amplifying unit have a common current path. The transformer directly electrically decouples the two radiofrequency terminals from the active mixer unit, and couples the first circuit section and the second circuit section together such that each of the two circuit sections is separately supplied with a full operating voltage of the integrated circuit. The integrated circuit may additionally include a second transformer connected between the active mixer unit and the two intermediate frequency terminals.