Oscillators – Solid state active element oscillator – Significant distributed parameter resonator
Reexamination Certificate
2005-06-21
2005-06-21
Kinkead, Arnold (Department: 2817)
Oscillators
Solid state active element oscillator
Significant distributed parameter resonator
C331S17700V, C331S1160FE, C331S1160FE, C331S1070DP, C331S03600C, C333S193000, C310S31300R
Reexamination Certificate
active
06909334
ABSTRACT:
A two port, single pole SAW resonator is employed for a local oscillator to eliminate the secondary frequency responses of the prior art without adding additional inductances and capacitances within an amplifier stage. The stray capacitance which is seen within the equivalent circuit of a single pole, two port SAW resonator at a port for the SAW resonator is tuned out by coupling an appropriately sized inductance in parallel with that stray capacitance. Access to the series resonator within the SAW resonator equivalent circuit is thus provided, permitting direct tuning of the resonant frequency for the SAW resonator. The high Q of the SAW resonator ensures low phase noise/edge jitter, while direct tuning of the series resonator enables a wide tune range. The tunable SAW resonator circuit is thus well-suited for use in a low phase noise tunable oscillator employed, for instance, in clock recovery within SONET applications.
REFERENCES:
patent: 4560951 (1985-12-01), Futterer
patent: 4581592 (1986-04-01), Bennett
patent: 5608360 (1997-03-01), Driscoll
patent: 6426683 (2002-07-01), Gu et al.
patent: 196 34 622 (1998-03-01), None
patent: 0 386 498 (1990-02-01), None
patent: 2 047 491 (1980-11-01), None
patent: 11-346142 (1999-12-01), None
Schmitt, R.F., et al: “Designing an EMC-Compliant UHF Oscillator,” RF Design Cardiff Publishing Co., Englewood, CO, U.S., vol. 23, NR. 10, pp. 40, 42, 44, 46, 48, 50, 52, 54, XP001025221, ISSN: 0163-321X.
Driscoll, M.M.: “Linear Frequency Tuning of Saw Resonators,” pp. 191-194, XPO10090619.
Parker, T.E., et al: “Precision Surface-Acoustic-Wave (SAW) Oscillators,” IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, IEEE Inc., New York, U.S., vol. 35, NR. 3, pp. 342-363, XP000047422, ISSN: 0885-3010.
Rohde, U.L.: “Designing Saw Resonators and DRO Oscillators Using Nonlinear CAD Tool,” Frequency Control Symposium, 1995; 49th Proceedings of the 1995 IEEE International San Francisco, CA, U.S.A. 31 US, pp. 379-395: XP010155195; ISBN: 0-7803-2500-1.
Wessendorf, K, et al: “Oscillator Design Techniques Allow High-Frequency Applications,” RF Design, Cardiff Publishing Co., Englewood, CO. U.S., vol. 21, NR. 3, pp. 38, 40, 42, 44, XP000755034. ISSN: 0163-321X.
Gonda, J., et al: “A Wide Pull Range Hybrid VCSO for Optical Transmission Networks,” pp. 59-63, XP010090597.
“Applications des Resonateurs a Ondes de Surface”; Electronique Radio Plans, SPE, Paris, France, 564; XP000477719: pp. 87-95.
Kinkead Arnold
RF Monolithics, Inc.
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