Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Reexamination Certificate
2006-01-31
2006-01-31
Nguyen, Simon (Department: 2685)
Telecommunications
Transmitter and receiver at same station
With frequency stabilization
C455S076000, C455S209000, C455S260000, C455S285000
Reexamination Certificate
active
06993295
ABSTRACT:
Methods and apparatus, in accordance with the present invention, use at least two phase-locked loop based frequency synthesizers to provide a synthesized frequency output having a step size of X, where X is less than the step size of any of the at least two phase-locked loop based oscillators. By combining a first signal having a first frequency, with the output of a first frequency synthesizer having a first frequency step size, NX, to produce an intermediate signal which is in turn combined with the output a second frequency synthesizer having a second frequency step size, MX, an output signal is produced. M and N are related such that i times M=N±1, and i, M and N are integers. By varying the output frequency of the first and second frequency synthesizers, the frequency of the output signal is changed by steps of X, where X is less than the step size of either the first or second frequency synthesizers.
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Donald K. Weaver, Jr., A Third Method of Generation and Detection of Single-Sideband Signals, Proceedings of the IRE, vol. 44, No. 12, Published on Dec., 1956, pp. 1703-1705, The Institute of Radio Engineers, Inc.
Finn James S.
Intel Corporation
Nguyen Simon
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