Radio transmitter architecture comprising a PLL and a...

Details Radio transmitter architecture comprising a PLL and a... Radio transmitter architecture comprising a PLL and a...

2006-10-10

2006-10-10

Le, Lana (Department: 2618)

Telecommunications

Transmitter

Amplitude modulation

C455S101000, C455S126000, C455S112000, C375S302000

Reexamination Certificate

active

07120396

ABSTRACT:
The transmitter circuit architecture is disclosed based on a phase lock loop architecture and which uses a delta-sigma modulator with 2 point modulation. In order to restrict the bandwidth of the PLL, subsidiary analogue modulation is employed, which requires aligning with the delta-sigma modulation. Alignment of the modulation is accomplished by correction of the sensitivity of the PLL voltage controlled oscillator to modulation by correlating residual modulation in the PLL with the modulated signal input. The action of the modulation correlator trims the modulation and the PLL bandwidth without disturbing the normal operation of the transmitter, and allows the use of modulation bandwidths greater than the PLL bandwidth.

REFERENCES:
patent: 5337024 (1994-08-01), Collins
patent: 6784817 (2004-08-01), Matsuura et al.
patent: 6809669 (2004-10-01), Robinson
patent: 6920182 (2005-07-01), Bolton, Jr.
patent: 2003/0157905 (2003-08-01), Holmqvist
patent: 2004/0038648 (2004-02-01), Matsuura et al.

Affiliated with

Also associated with

Rating

Radio transmitter architecture comprising a PLL and a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Radio transmitter architecture comprising a PLL and a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio transmitter architecture comprising a PLL and a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3706145