Noise resistant low phase noise, frequency tracking...

Oscillators – Solid state active element oscillator – Significant distributed parameter resonator

Reexamination Certificate

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C331S17700V, C331S1160FE, C331S1160FE, C331S1070DP, C333S193000, C333S194000, C333S195000, C310S31300R

Reexamination Certificate

active

06914493

ABSTRACT:
To secure the benefits of a low phase noise, wide tune range SAW oscillator in noisy environments, the tunable two port SAW resonator circuit within the oscillator is employed in differential mode, connected to a differential amplifier circuit to create a differential oscillator. In the absence of any need for ground or power supply voltage level references, low phase noise/edge jitter is maintained even in hostile environments while providing sufficient tune range to track small frequency changes. The resulting differential mode SAW oscillator is thus well-suited for use, for instance, in clock recovery within SONET applications.

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