Transmission modulation apparatus

Telecommunications – Transmitter – With feedback of modulated output signal

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C455S127100

Reexamination Certificate

active

07747230

ABSTRACT:
A transmission modulation apparatus capable of dealing with characteristic variations of a high-frequency power amplifier without always forming an amplitude loop. Transmission modulation apparatus100is configured with level detector140that receives input of a level detection control signal and detects the output signal of high-frequency power amplifier130, and offset voltage correcting section150that corrects an offset voltage using collinear approximation including a first point where the relationship between the power supply voltage value and the output voltage starts to shift from linear to non-linear based on an output signal of level detector140and a second point where output voltage is a minimum. Offset voltage correction is adaptively executed, and linearity between the voltage value of the baseband amplitude signal and the output voltage of high-frequency power amplifier130when the voltage value of the baseband amplitude signal is low is compensated.

REFERENCES:
patent: 6043707 (2000-03-01), Budnik
patent: 7110730 (2006-09-01), Okada et al.
patent: 2005/0118965 (2005-06-01), Tanabe et al.
patent: 2006/0159198 (2006-07-01), Morimoto et al.
patent: 2003/018026 (2003-01-01), None
patent: 2004007434 (2004-01-01), None
patent: 2005/167541 (2005-06-01), None
patent: 2005/104352 (2005-11-01), None
International Search Report dated Aug. 21, 2007.
International Search Report dated May 22, 2006.
International Search Report dated Jun. 6, 2007.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Transmission modulation apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transmission modulation apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmission modulation apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4163422

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.