Modulated local oscillator
OwnerTajinder Manku, Leonard Maceacherninventors
Life of this patent
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Abstract
A method of performing a frequency conversion of a radio frequency (RF) information signal by mixing the information signal with a modulated signal from local oscillator. The local oscillator signal is modulated with a periodic, coded or pseudo-random modulating signal. A system for generating an intermediate frequency (IF) output signal from the information signal is also provided.
Claims13
A modulated local oscillator for signal frequency conversion, comprising:
- first input means for receiving a periodic local oscillator signal;
- second input means for receiving a modulating signal;
- and output means for supplying a modulated local oscillator signal.
A system for frequency converting an information signal containing data comprising:
- modulating means having a first input for receiving a local oscillator signal, a second input for receiving a modulating signal and output means for providing a modulated local oscillator signal;
- a mixer having a first mixer input for receiving said information signal and a second mixer input for receiving said modulated local oscillator signal;
- and output means for supplying a frequency converted intermediate signal.
A method of frequency converting an information signal containing data comprising the steps of:
- providing said information signal to a first input of a mixer;
- providing a modulated local oscillator signal to a second input of said mixer;
- and mixing said information signal and said modulated local oscillator signal to generate a frequency converted intermediate signal.
Dependencies are inferred from the claim text.