Apparatus and method for generating RF without harmonic...

Details Apparatus and method for generating RF without harmonic... Apparatus and method for generating RF without harmonic...

2005-12-29

2011-11-01

Le, Lana N (Department: 2614)

Telecommunications

Transmitter

Noise or interference elimination

C455S041200, C455S315000

Reexamination Certificate

active

08050636

ABSTRACT:
A transmitter capable of operating according to a first standard that does not interfere with a nearby frequency generator operating according to a second standard. The transmitter comprises an oscillator, a frequency divider, a mixer, and a filter. The oscillator is configured to output a first frequency that is outside of a frequency harmonic of the frequency generator. The frequency divider is coupled to the oscillator and divides the first frequency by a selective divide ratio to produce a second frequency. The mixer is configured to receive the first and second frequencies, which combines them to produce a mixed frequency. The filter is then used to filters the mixed frequency to obtain the higher portion of the mixed frequency. The divide ratio of the frequency divider is selected base on the desired output frequency of the transmitter such that a 2.4 GHz or 5 GHz ISM band frequency is achieved.

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