Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2008-01-15
2008-01-15
Vuong, Quochien B. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S334000, C327S113000
Reexamination Certificate
active
07319851
ABSTRACT:
The invention relates to a mixer circuit comprising an input node for receiving an input signal, a first output node202, and a second output node203, voltage to current conversion means and switching means operatively coupled to each other and to the input node, the first output node and the second output node to generate a mixed input signal at the first output node and the second output node in response to an oscillator signal. In an embodiment the voltage to current conversion means comprises a first and a second voltage to current converter, implemented as N-MOSFETs M2and M3, with their gates connected to the input node. The drain of M2is connected to the first output node202, while the drain of the M3is connected to the second output node M3. The source of M2is connected to the switching node221, while the source of M3is connected to the second switching node222. The switches SW are arranged to couple the first switching node221to a first supply voltage VDD and the second switching node222to a second supply voltage VSS during a first phase of the oscillator signal, and the first switching node221to VDD and the second switching node222to VSS during a second phase of the oscillator signal. The mixer circuit according to the invention may operate at low supply voltages by using switches connected only to the supply voltages VSS and VDD. Mixing is achieved by voltage to current converters GM1and GM2, which are alternatingly activated by the switches SW.
REFERENCES:
patent: 5825231 (1998-10-01), Chevallier et al.
patent: 6959178 (2005-10-01), Macedo et al.
patent: 2003/0003891 (2003-01-01), Kivekas et al.
patent: 2004/0113679 (2004-06-01), vanZeijl
patent: 2004/0142674 (2004-07-01), Kuiri
Klumperink Eric Antonius Maria
Louwsma Simon Minze
Stikvoort Eduard Ferdinand
NXP B.V.
Vuong Quochien B.
LandOfFree
Mixer circuit, receiver comprising a mixer circuit, wireless... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mixer circuit, receiver comprising a mixer circuit, wireless..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mixer circuit, receiver comprising a mixer circuit, wireless... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2812553