Pulse or digital communications – Transmitters
Reexamination Certificate
2006-02-21
2006-02-21
Fan, Chieh M. (Department: 2638)
Pulse or digital communications
Transmitters
C375S302000, C375S309000
Reexamination Certificate
active
07003049
ABSTRACT:
Digital I and Q (NRZ) data streams are generated by specially configured conversion circuits, the outputs of which are applied to a F-N synthesizer to modulate the synthesizer. All illustrative conversion circuit employs a system of comparators to detect the state of analog I and Q signals at each bit interval and to decode outputs of such comparators to determine the NRZ sequence that gave rise to detected states. Once so determined, these NRZ signals are applied to an F-N synthesizer in the same manner as NRZ signals. Advantageously, inputs to present inventive embodiments may be received either as analog or digital I and Q inputs, subject to selection between input modes using only a single binary input.
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Fan Chieh M.
Perilla Jason M.
RF Micro Devices, Inc.
Withrow & Terranova , PLLC
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