Mixer circuit, receiving circuit, transmitting circuit, and...

Details Mixer circuit, receiving circuit, transmitting circuit, and... Mixer circuit, receiving circuit, transmitting circuit, and...

2007-06-08

2011-10-25

Phu, Sanh (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S323000, C455S334000, C455S317000, C455S318000, C455S333000, C331S167000, C331S17700V, C331S1170FE

Reexamination Certificate

active

08045950

ABSTRACT:
A mixing circuit is provided that includes a charge circuit, an oscillating circuit inlet step which is connected to a circuit which feeds an oscillating signal, and a signal inlet step. The oscillating circuit inlet step comprises at least two bipolar-transistors and the emitters thereof are connected to a constant potential which is independent from the oscillating signal. The mixing circuit is used, preferably, in a base station or a mobile radio device of a cellular radio network.

REFERENCES:
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patent: 7676212 (2010-03-01), Jin et al.
patent: 2002/0013137 (2002-01-01), Asam
patent: 1 292 018 (2003-03-01), None
“Minolithische Integration von Frequenzumsetzern bis 45 GHz in Silizium und SiGe,” by Sabine Hackl, Feb. 2002 at the Unitversity of Vienna.

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