Methods and apparatuses for tuning voltage controlled...

Oscillators – Combined with particular output coupling network

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C331S03600C, C331S016000, C331S1170FE, C331S179000, C331S185000

Reexamination Certificate

active

10964837

ABSTRACT:
A method and apparatus for tuning a VCO circuit to provide desired modulations is described. In one embodiment, the method of the present invention uses a controlled voltage from a digital-to-analog converter to obtain VCO voltage/frequency characteristics. The VCO voltage/frequency characteristics are used to determine a VCO capacitance value as well as a charge pump current level for each frequency band of interest. For one embodiment, the VCO circuit includes a bank of switchable capacitors used to set the VCO capacitance value. The charge pump includes a number of switch-controlled current meters to set the charge pump current level. The VCO capacitors and charge pump current meters are controlled by an off-chip CPU.

REFERENCES:
patent: 5182528 (1993-01-01), Zuta
patent: 5625325 (1997-04-01), Rotzoll et al.
patent: 6366393 (2002-04-01), Feulner et al.
patent: 6512419 (2003-01-01), Adams et al.
patent: 6583675 (2003-06-01), Gomez
patent: 6836192 (2004-12-01), Yang et al.
patent: 0493251 (1992-01-01), None
patent: 2 337 884 (1999-12-01), None
Tsung-Hsien Lin and William J. Kaiser, “A 900MHz, 2.5mA CMOS Frequency Synthesizer with an Automatic, SC Tuning Loop, ” Electrical Engineering Dept., University of California, Los Angeles, IEEE Conference, Orlando, FL, May 21-24, 2000, pp. 375-378.

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

Methods and apparatuses for tuning voltage controlled... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and apparatuses for tuning voltage controlled..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatuses for tuning voltage controlled... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3850335

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