SNAA342 September   2020 LMX2820

 

  1.   Trademarks
  2. 1 Overview of Frequency Hopping
  3. 2 Integrated VCO Overview
    1. 2.1 Integrated Silicon VCO Structure
    2. 2.2 Robustness and Consistency of VCO Calibration
  4. 3Components of Synthesizer Lock Time
    1. 3.1 Write Time
    2. 3.2 VCO Calibration Time
    3. 3.3 Analog Settling Time
  5. 4Improving VCO Calibration Time With the LMX2820
    1. 4.1 Improving LMX2820 VCO Calibration With Partial Assist
    2. 4.2 Full Assist Method of Improving VCO Calibration Time
    3. 4.3 Instant Calibration – The Ultimate to Blazing-Fast VCO Calibration
  6. 5Conclusion
  7. 6References

4 Improving VCO Calibration Time With the LMX2820

In Figure 4-1, we can see the raw unassisted calibration time of 153 μs before any enhancements are used. The LMX2820 synthesizer from Texas instruments has several enhancements for fast switching time.

GUID-20200906-CA0I-SH95-RPVQ-XKR0M4RDJ0QG-low.gifFigure 4-1 LMX2820 Unassisted Lock Time