Clockless pulse shaping circuit for controlling a power...

Details Clockless pulse shaping circuit for controlling a power... Clockless pulse shaping circuit for controlling a power...

2006-11-14

2006-11-14

Mai, Lam T. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S144000

Reexamination Certificate

active

07136003

ABSTRACT:
According to an exemplary embodiment, a circuit includes a power amplifier configured to generate an RF output signal. The circuit further includes a pulse shaping circuit coupled to the power amplifier, where the pulse shaping circuit is configured to receive a digital input signal and generate an analog output signal at a first node, and where the analog output signal controls the RF output signal. The analog output signal has a ramp-up portion having a first shape, where the first shape corresponds to a piece-wise-linear approximation of a sinusoid. The analog output signal also has a ramp-down portion having a second shape, where the second shape corresponds to the piece-wise-linear approximation of a sinusoid. The pulse shaping circuit does not require a clock reference to generate the analog output signal.

REFERENCES:
patent: 6462688 (2002-10-01), Sutardja

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