Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control
Reexamination Certificate
2005-08-02
2010-02-23
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular or pulse waveform width control
C332S115000, C332S149000
Reexamination Certificate
active
07667511
ABSTRACT:
Efficient PAM transmit modulation is provided by a PAM modulator that includes an oscillator (404) that provides a clock signal, CKV, (408). The clock signal408and a delayed version (CKV_DLY)420of the clock signal are provided to a logic gate (414). The output of logic gate (414) is used as a power amplifier input signal (PA_IN) for radio frequency power amplifier (416). Depending on the relative time delay of the CKV clock signal (408) and the CKV_DLY delayed clock signal (420), the timing and duty cycle of the logic gate (414) duty cycle can be controlled. The duty cycle or pulse-width variation affects the turn-on time of the power amplifier (416); thereby establishing the RF output amplitude.
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Leipold Dirk
Maggio Kenneth J.
Staszewski Robert B.
Brady III Wade J.
Donovan Lincoln
Hiltunen Thomas J
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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