Transmit sequencing

Details Transmit sequencing Transmit sequencing

1996-04-19

1998-09-01

Vo, Nguyen

Telecommunications

Transmitter

Having harmonic radiation suppression

455 75, 455127, 455260, 331 17, H04B 104

Patent

active

058024506

ABSTRACT:
A method and apparatus for initializing a radio transmission apparatus comprising a voltage control oscillator, a phase lock loop, and a power amplifier is disclosed so as to avoid generating unwanted interference in neighboring radio channels. First, the voltage control oscillator is enabled and the phase locked loop is switched from a narrow band mode to a wide bandwidth mode to give faster settling time and reduced overshoot. The power amplifier is then smoothly ramped up to a final power level. Finally, the phase locked loop is switched from the wide bandwidth mode to the narrow bandwidth mode after the power amplifier has substantially reached the final power level.

REFERENCES:
patent: 5142246 (1992-08-01), Petersson
patent: 5175729 (1992-12-01), Borras et al.
patent: 5438703 (1995-08-01), Ng et al.
patent: 5463351 (1995-10-01), Marko et al.
patent: 5498998 (1996-03-01), Gehrke et al.
patent: 5499392 (1996-03-01), Grunwell
patent: 5559474 (1996-09-01), Matsumoto

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