Feedforward linear amplifier

Amplifiers – Hum or noise or distortion bucking introduced into signal...

Reexamination Certificate

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C330S151000

Reexamination Certificate

active

06885242

ABSTRACT:
A control circuit for a feed forward amplifier provides for pausing control and continuous adjustment of a control signal, provides for the control signal to start at any point, provides for rapid convergence, and that does not perturb the system up or down one step to confirm the convergence of the system. The control circuit receives a sampled version of a feed forward amplifier output signal, generates a non-offset control signal based on the sampled output signal, separately generates an offset voltage by reference to voltages stored in a table or based on the non-offset control signal, and combines the non-offset control signal with the offset voltage to produce a control signal. The feed forward amplifier may then adjust an error signal based on the control signal to produce an adjusted error signal that is capable of reducing distortion in the feed forward amplifier.

REFERENCES:
patent: 4980652 (1990-12-01), Tarusawa et al.
patent: 5929704 (1999-07-01), Proctor et al.
patent: 6429738 (2002-08-01), Kenington

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