Oscillators – Beat frequency – Frequency stabilization
Reexamination Certificate
2006-06-07
2010-02-02
Chang, Joseph (Department: 2817)
Oscillators
Beat frequency
Frequency stabilization
C331S040000
Reexamination Certificate
active
07656238
ABSTRACT:
A frequency synthesizing apparatus and method having an injection-locked quadrature VCO in an RF transceiver is provided. In the frequency synthesizer, an I signal following a frequency of a high frequency signal that is input using the injection-locked quadrature VCO and a Q signal thereof are simultaneously generated to have an appropriate driving power. Accordingly, the I signal and the Q signal thereof that are generated in the injection-locked quadrature VCO may be utilized as a local signal for frequency up/down-conversion, without being buffered. An output of an SSB mixer may be directly input into the injection-locked quadrature VCO. Also, high frequency signals that are generated in another circuit such as the SSB mixer, a PLL, or a VCO may be selected to be input into the injection-locked quadrature VCO by a selector.
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Deok Suh Chun
Kim Hoon Tae
Koh Jeong Wook
Chang Joseph
Samsung Electronics Co,. Ltd.
Sughrue & Mion, PLLC
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