Modulators – Frequency modulator
Reexamination Certificate
2009-03-30
2011-12-06
Kinkead, Arnold (Department: 2817)
Modulators
Frequency modulator
C455S023000, C455S024000, C455S041100, C455S041200, C455S042000, C455S289000, C455S318000, C455S334000, C455S223000, C307S104000, C343S850000
Reexamination Certificate
active
08072284
ABSTRACT:
A split delay-line oscillator for secure data transmission is disclosed. In one embodiment, an apparatus for a split delay-line oscillator for secure data transmission includes a first modulator/demodulator block in a first device, the first modulator/demodulator block operable to insert a first variable delay to modulate a frequency of a shared carrier signal passing through the first modulator/demodulator block, and a second modulator/demodulator block in a second device, the second modulator/demodulator block operable to insert a second variable delay to modulate the frequency of the shared carrier signal passing through the second modulator/demodulator block, wherein the first and second devices create a shared secret by contributing data on the frequency-modulated shared carrier signal.
REFERENCES:
patent: 7711322 (2010-05-01), Rhodes et al.
patent: 7841528 (2010-11-01), Savry et al.
Wikipedia, “Delay line oscillator”, printed from Internet on Jun. 27, 2011, 1 page, http://en.wikipedia.org/wiki/Delay—line—oscillator, modified on Mar. 29, 2011.
Chemishkian Sergey
Rhodes Bradley
Savitzky Stephen
Blakely , Sokoloff, Taylor & Zafman LLP
Kinkead Arnold
Ricoh Co. Ltd.
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