Integrated ramp, sweep fractional frequency synthesizer on...

Details Integrated ramp, sweep fractional frequency synthesizer on... Integrated ramp, sweep fractional frequency synthesizer on...

2009-05-04

2011-12-27

Mis, David (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Search sweep of oscillator

C331S016000, C331S023000

Reexamination Certificate

active

08085097

ABSTRACT:
An integrated ramp, sweep fractional frequency synthesizer system on an integrated circuit chip includes an integrated circuit chip having a fractional frequency synthesizer with a fractional divider responsive to a VCO and a ΔΣ modulator for modifying the divisor of the fractional divider; and a ramp generator on the same integrated circuit chip; the ramp generator being responsive to a trigger signal to generate a ramp for sweeping the frequency of said fractional frequency synthesizer.

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Written Opinion from International Searching Authority, PCT/US2009/002778, dated Jun. 24, 2009, 5 pages (unnumbered).
M. Pichler et al., “Phase-Error Measurement and Compensation in PLL Frequency Synthesizers for FMCW Sensors-I: Context and Application”, IEEE Transactions on Circuits and Systems, vol. 54, No. 5, May 2007, pp. 1006-1017.
M. Pichler et al., “Phase-Error Measurement and Compensation in PLL Frequency Synthesizers for FMCW Sensors-II: Theory”, IEEE Transactions on Circuits and Systems, vol. 54, No. 6, Jun. 2007, pp. 1224-1235.

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