Pulse or digital communications – Transmitters
Reexamination Certificate
2008-01-22
2008-01-22
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Transmitters
Reexamination Certificate
active
11015608
ABSTRACT:
A method and apparatus for modulating a digital input signal is disclosed. The digital input signal is partitioned into a less-significant bit signal and a more-significant bit signal. A lower-order modulation of the less-significant bit signal is performed to generate an intermediate output signal. The intermediate output signal is appended to the more-significant bit signal to form an intermediate input signal. A higher-order modulation of the intermediate input signal is performed to generate a digital output signal. The higher-order modulation is of an order higher than the lower-order modulation. A phase-locked loop using the method and apparatus is disclosed.
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Fan Chieh M.
Perilla Jason M.
Verigy (Singapore Pte. Ltd.
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