Phase locked oscillator and radar unit having the same

Details Phase locked oscillator and radar unit having the same Phase locked oscillator and radar unit having the same

2011-08-23

2011-08-23

Nguyen, Hai L (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S147000

Reexamination Certificate

active

08004327

ABSTRACT:
An error detecting unit of a phase-locked oscillator evaluates difference between a reference phase error signal output from a phase detector and a phase error signal actually output from the phase detector when a reference frequency modulation signal is output from a voltage-controlled oscillator and further detects a frequency error of the frequency modulation signal from the voltage-controlled oscillator based on a rate of change of the difference. A correction unit of the phase-locked oscillator calculates an average value of the frequency error in a predetermined section of the frequency modulation signal and corrects center frequency of the frequency modulation signal by correcting the average value to be zero, and changes the rate of change of control voltage per control step based on comparison between at least two frequency errors in one cycle of the frequency modulation signal. Thus frequency shift of the frequency modulation signal is corrected.

REFERENCES:
patent: 7091759 (2006-08-01), Sowlati et al.
patent: 7459946 (2008-12-01), Bollenbeck et al.
patent: 7521974 (2009-04-01), Kirschenmann
patent: 2003/0016163 (2003-01-01), Isaji
patent: 2003/0184470 (2003-10-01), Ishii et al.
patent: 2004/0012447 (2004-01-01), Nagaishi et al.
patent: 2005/0007271 (2005-01-01), Isaji
patent: 09312521 (1997-12-01), None
patent: 200328951 (2003-01-01), None
patent: 2003294835 (2003-10-01), None
patent: 200456172 (2004-02-01), None
International Search Report dated Nov. 6, 2007, in corresponding International application No. PCT/JP2007/000922.

Affiliated with

Also associated with

Rating

Phase locked oscillator and radar unit having the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase locked oscillator and radar unit having the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase locked oscillator and radar unit having the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2722184