| US 7,509,111 B2 | ||
| Integrated circuit having a mixer circuit | ||
| Jorg Langenberg, Dorsten (Germany); Thomas Liebermann, Munich (Germany); Werner Simburger, Haar (Germany); Marc Tiebout, Munich (Germany); and Hans-Dieter Wohlmuth, Munich (Germany) | ||
| Assigned to Infineon Technologies AG, Neubiberg (Germany) | ||
| Filed on Oct. 29, 2004, as Appl. No. 10/978,242. | ||
| Application 10/978242 is a continuation of application No. PCT/DE03/01204, filed on Apr. 10, 2003. | ||
| Claims priority of application No. 102 19 335 (DE), filed on Apr. 30, 2002. | ||
| Prior Publication US 2005/0118979 A1, Jun. 02, 2005 | ||
| Int. Cl. H04B 1/40 (2006.01) | ||
| U.S. Cl. 455—326 [455/333] | 30 Claims |
| 1. An integrated circuit, comprising:
a mixer circuit, which has a first circuit section and a second circuit section;
the first circuit section having two radiofrequency terminals;
the second circuit section having two reference oscillator terminals, an active mixer unit with a signal-amplifying unit,
and two intermediate frequency terminals, wherein the active mixer unit and the signal-amplifying unit have a common current
path;
a transformer that 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; and
wherein the first circuit section further comprises at least one filter element connected between the radiofrequency terminals
and the transformer, and the at least one filter element is connected to the full operating voltage of the integrated circuit.
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