Up/down converter

Details Up/down converter Up/down converter

2006-05-02

2006-05-02

Trinh, Sonny (Department: 2687)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S188100, C455S323000

Reexamination Certificate

active

07039375

ABSTRACT:
The invention provides an up/down converter with low phase noise. Signals from a first local oscillator are fed through a power splitter to first and second mixers. Signals from a second local oscillator and signals from the power splitter are mixed by the second mixer. The frequency component of the difference between the two signals is removed by a first bandpass filter and passed to a third mixer. Input signals are mixed with signals from the power splitter by the first mixer, and the lower frequency component of the output signals from the first mixer is removed by a second bandpass filter and is passed to the third mixer. Signals from the first and second bandpass filters are mixed by the third mixer. The higher frequency component of the output signals is removed by a low pass filter and is output.

REFERENCES:
patent: 5300838 (1994-04-01), Elizondo
patent: 5737035 (1998-04-01), Rotzoll
patent: 6600906 (2003-07-01), Roppongi
patent: WO 03/077490 (2003-09-01), None
Cutler et al., “RF Vector Signal Analyzer Hardware Design” HP Journal, pp 47-59.
Manassewitsch, “Frequency Synthisizers Theory and Design”, Wiley and Sons, pp 100-105, 134-141.

Affiliated with

Also associated with

Rating

Up/down converter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Up/down converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Up/down converter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3623078