Multiple band RF transmitters and receivers having...

Details Multiple band RF transmitters and receivers having... Multiple band RF transmitters and receivers having...

2007-09-04

2007-09-04

Urban, Edward F. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency or phase modulation

C455S189100, C455S315000, C455S318000

Reexamination Certificate

active

10856125

ABSTRACT:
Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillator used by the local oscillator circuits, thus allowing the use of small divisor numbers in the local oscillator circuits and reducing phase noise. Independent high-side and low-side RF local oscillators may be provided and selectively used depending on the RF channel to be transmitted or received.

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