Oscillators – Solid state active element oscillator – Significant distributed parameter resonator
Reexamination Certificate
2007-04-03
2007-04-03
Kinkead, Arnold (Department: 2817)
Oscillators
Solid state active element oscillator
Significant distributed parameter resonator
C331S17700V, C331S1160FE, C331S1070DP, C331S1160FE
Reexamination Certificate
active
11156888
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.
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Kinkead Arnold
RF Monolithics, Inc.
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