Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2003-06-04
2009-02-10
Lee, John J (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S189100, C455S323000, C455S255000
Reexamination Certificate
active
07489916
ABSTRACT:
Direct down-conversion mixer. A direct down-conversion mixer is provided. The mixer comprises an LO switching pair coupled to receive an RF input signal and produce a down converted output signal. The mixer also comprises an integrator coupled to receive the output signal and produce an integrator output signal. The mixer also comprises a control circuit coupled to receive an input voltage and the integrator output signal to produce a control signal that is coupled to the LO switching pair.
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Costa Damian
Farias Michael
Groe John
Cooley Godward Kronish LLP
Lee John J
Sequoia Communications
Tagliaferri, Esq. Daniel
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