Double sideband-intermediate frequency radio receiver...

Details Double sideband-intermediate frequency radio receiver... Double sideband-intermediate frequency radio receiver...

2007-05-01

2007-05-01

Ghayour, Mohammed (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S355000, C375S144000, C370S342000

Reexamination Certificate

active

10081668

ABSTRACT:
A radio frequency (RF) receiver comprising: 1) a local oscillator (LO) circuit capable of receiving a local oscillator (LO) reference signal having frequency, LO, and a double sideband (DSB) clock signal having a frequency, DSB, and generating therefrom an in-phase product signal of the LO reference signal and the DSB clock signal in which a polarity of the LO reference signal is reversed at the DSB frequency of the DSB clock signal; and 2) a first radio frequency (RF) mixer having a first input port capable of receiving the in-phase product signal from the LO circuit and a second input port capable of receiving a modulated radio frequency (RF) signal, wherein the first RF mixer generates a first downconverted output signal.

REFERENCES:
patent: 5150121 (1992-09-01), Newell et al.
patent: 5377225 (1994-12-01), Davis
patent: 6108367 (2000-08-01), Herman et al.
patent: 6400233 (2002-06-01), Thomas
patent: 2003/0031273 (2003-02-01), Mohindra

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