Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2007-04-17
2007-04-17
Nguyen, Duc M. (Department: 2617)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S318000, C455S319000
Reexamination Certificate
active
10421700
ABSTRACT:
The present invention relate to a wideband frequency generating apparatus using a frequency dividing method of dividing a frequency signal of a voltage control oscillator to expand a frequency generating range. The apparatus comprises an oscillator unit generating a predetermined frequency signal, a mixer having a first input coupled to the oscillator unit to generate a difference signal by mixing the predetermined frequency signal with a signal inputted to a second input of the mixer, a first switch tuned on/off and coupling the predetermined frequency signal to an output of the mixer, a second switch turned on/off and coupling the output of the mixer to the second input of the mixer to form a feedback loop, a ½ frequency divider dividing the output of the mixer by ½ to generate a divided signal, a third switch tuned on/off and coupling the divided signal of the ½ frequency divider to the second input of the mixer unit, and a control logic unit generating on/off control signals turning on/off the mixer, the first switch, the second switch, the third switch in accordance with a selection of frequency generating ranges.
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Choi Gi Won
Kwon Hyo Seok
Na Yoo Sam
Oh Seung Min
Lee Justin
Lowe Hauptman & Berner LLP.
Nguyen Duc M.
Samsung Electro-Mechanics Co. Ltd.
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