Systems, methods and devices for dual closed loop modulation...

Details Systems, methods and devices for dual closed loop modulation... Systems, methods and devices for dual closed loop modulation...

2006-04-14

2009-06-30

Le, Nhan T (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S127200, C455S234100, C455S340000, C375S345000

Reexamination Certificate

active

07555275

ABSTRACT:
In accordance with various exemplary embodiments of the present invention, systems, methods and devices are configured to facilitate RF envelope amplitude control. For example, a RF envelope amplitude control system comprises: a RF amplifier, wherein the RF amplifier is associated with a feedback device that is configured to create a first feedback signal representing the power in an RF output signal; a transmit waveform generator configured to generate a reference waveform signal; an adaptive table waveform generator configured to compare the reference waveform signal and the first feedback signal and to create a second feedback signal based on that comparison; and a loop filter configured to combine the reference waveform signal, the first feedback signal, and the second feedback signal to form an amplifier control signal, wherein the amplifier control signal is provided to the RF amplifier to adjust the RF output signal to conform to a specified RF envelope.

REFERENCES:
patent: 5861766 (1999-01-01), Baumer et al.
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patent: 6275057 (2001-08-01), Takizawa
patent: 2005/0074076 (2005-04-01), Chen et al.
patent: 2005/0275976 (2005-12-01), Taimela et al.
patent: 2006/0002157 (2006-01-01), Petter et al.
patent: WO 00/35080 (2000-06-01), None
patent: WO 2005/027342 (2005-03-01), None

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